Microsoft Graph chats.pinnedChatMessageInfo API

openapi: 3.2.0
info:
  title: Microsoft Graph Admin Admin.admin Chats.pinned Chat Message Info API
  description: 'Microsoft Graph API for managing administrative resources in Microsoft Entra ID.

    This API enables administrators to manage Microsoft Edge browser settings, Internet Explorer mode configurations,

    site lists, shared browser sites, Microsoft 365 Apps installation options, people insights, service announcements,

    SharePoint settings, Copilot administration, directory administrative units, and admin consent policies.'
  version: 1.0.0
  contact:
    name: Microsoft Graph API Support
    url: https://developer.microsoft.com/graph
servers:
- url: https://graph.microsoft.com/v1.0
  description: Microsoft Graph API v1.0 endpoint
tags:
- name: chats.pinnedChatMessageInfo
paths:
  /chats/{chat-id}/pinnedMessages:
    description: Provides operations to manage the pinnedMessages property of the microsoft.graph.chat entity.
    parameters:
    - name: chat-id
      in: path
      description: The unique identifier of chat
      required: true
      schema:
        type: string
      x-ms-docs-key-type: chat
    get:
      tags:
      - chats.pinnedChatMessageInfo
      summary: Microsoft Graph List pinnedChatMessages in a chat
      description: Get a list of pinnedChatMessages in a chat.
      externalDocs:
        description: Find more info here
        url: https://learn.microsoft.com/graph/api/chat-list-pinnedmessages?view=graph-rest-1.0
      operationId: chats.ListPinnedMessages
      parameters:
      - $ref: '#/components/parameters/top'
      - $ref: '#/components/parameters/skip'
      - $ref: '#/components/parameters/search'
      - $ref: '#/components/parameters/filter'
      - $ref: '#/components/parameters/count'
      - name: $orderby
        in: query
        description: Order items by property values
        style: form
        explode: false
        schema:
          uniqueItems: true
          type: array
          items:
            type: string
      - name: $select
        in: query
        description: Select properties to be returned
        style: form
        explode: false
        schema:
          uniqueItems: true
          type: array
          items:
            type: string
      - name: $expand
        in: query
        description: Expand related entities
        style: form
        explode: false
        schema:
          uniqueItems: true
          type: array
          items:
            type: string
      responses:
        2XX:
          $ref: '#/components/responses/microsoft.graph.pinnedChatMessageInfoCollectionResponse'
        4XX:
          $ref: '#/components/responses/error'
        5XX:
          $ref: '#/components/responses/error'
      x-ms-pageable:
        nextLinkName: '@odata.nextLink'
        operationName: listMore
      x-ms-docs-operation-type: operation
    post:
      tags:
      - chats.pinnedChatMessageInfo
      summary: Microsoft Graph Pin a message in a chat
      description: Pin a chat message in the specified chat. This API cannot create a new chat; you must use the list chats method to retrieve the ID of an existing chat before you can pin a chat message.
      externalDocs:
        description: Find more info here
        url: https://learn.microsoft.com/graph/api/chat-post-pinnedmessages?view=graph-rest-1.0
      operationId: chats.CreatePinnedMessages
      requestBody:
        description: New navigation property
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/microsoft.graph.pinnedChatMessageInfo'
        required: true
      responses:
        2XX:
          description: Created navigation property.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/microsoft.graph.pinnedChatMessageInfo'
        4XX:
          $ref: '#/components/responses/error'
        5XX:
          $ref: '#/components/responses/error'
      x-ms-docs-operation-type: operation
  /chats/{chat-id}/pinnedMessages/{pinnedChatMessageInfo-id}:
    description: Provides operations to manage the pinnedMessages property of the microsoft.graph.chat entity.
    parameters:
    - name: chat-id
      in: path
      description: The unique identifier of chat
      required: true
      schema:
        type: string
      x-ms-docs-key-type: chat
    - name: pinnedChatMessageInfo-id
      in: path
      description: The unique identifier of pinnedChatMessageInfo
      required: true
      schema:
        type: string
      x-ms-docs-key-type: pinnedChatMessageInfo
    get:
      tags:
      - chats.pinnedChatMessageInfo
      summary: Microsoft Graph Get pinnedMessages from chats
      description: A collection of all the pinned messages in the chat. Nullable.
      operationId: chats.GetPinnedMessages
      parameters:
      - name: $select
        in: query
        description: Select properties to be returned
        style: form
        explode: false
        schema:
          uniqueItems: true
          type: array
          items:
            type: string
      - name: $expand
        in: query
        description: Expand related entities
        style: form
        explode: false
        schema:
          uniqueItems: true
          type: array
          items:
            type: string
      responses:
        2XX:
          description: Retrieved navigation property
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/microsoft.graph.pinnedChatMessageInfo'
        4XX:
          $ref: '#/components/responses/error'
        5XX:
          $ref: '#/components/responses/error'
      x-ms-docs-operation-type: operation
    patch:
      tags:
      - chats.pinnedChatMessageInfo
      summary: Microsoft Graph Update the navigation property pinnedMessages in chats
      operationId: chats.UpdatePinnedMessages
      requestBody:
        description: New navigation property values
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/microsoft.graph.pinnedChatMessageInfo'
        required: true
      responses:
        2XX:
          description: Success
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/microsoft.graph.pinnedChatMessageInfo'
        4XX:
          $ref: '#/components/responses/error'
        5XX:
          $ref: '#/components/responses/error'
      x-ms-docs-operation-type: operation
    delete:
      tags:
      - chats.pinnedChatMessageInfo
      summary: Microsoft Graph Unpin a message from a chat
      description: Unpin a message from a chat.
      externalDocs:
        description: Find more info here
        url: https://learn.microsoft.com/graph/api/chat-delete-pinnedmessages?view=graph-rest-1.0
      operationId: chats.DeletePinnedMessages
      parameters:
      - name: If-Match
        in: header
        description: ETag
        schema:
          type: string
      responses:
        '204':
          description: Success
        4XX:
          $ref: '#/components/responses/error'
        5XX:
          $ref: '#/components/responses/error'
      x-ms-docs-operation-type: operation
  /chats/{chat-id}/pinnedMessages/{pinnedChatMessageInfo-id}/message:
    description: Provides operations to manage the message property of the microsoft.graph.pinnedChatMessageInfo entity.
    parameters:
    - name: chat-id
      in: path
      description: The unique identifier of chat
      required: true
      schema:
        type: string
      x-ms-docs-key-type: chat
    - name: pinnedChatMessageInfo-id
      in: path
      description: The unique identifier of pinnedChatMessageInfo
      required: true
      schema:
        type: string
      x-ms-docs-key-type: pinnedChatMessageInfo
    get:
      tags:
      - chats.pinnedChatMessageInfo
      summary: Microsoft Graph Get message from chats
      description: Represents details about the chat message that is pinned.
      operationId: chats.pinnedMessages.GetMessage
      parameters:
      - name: $select
        in: query
        description: Select properties to be returned
        style: form
        explode: false
        schema:
          uniqueItems: true
          type: array
          items:
            type: string
      - name: $expand
        in: query
        description: Expand related entities
        style: form
        explode: false
        schema:
          uniqueItems: true
          type: array
          items:
            type: string
      responses:
        2XX:
          description: Retrieved navigation property
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/microsoft.graph.chatMessage'
        4XX:
          $ref: '#/components/responses/error'
        5XX:
          $ref: '#/components/responses/error'
      x-ms-docs-operation-type: operation
  /chats/{chat-id}/pinnedMessages/$count:
    description: Provides operations to count the resources in the collection.
    parameters:
    - name: chat-id
      in: path
      description: The unique identifier of chat
      required: true
      schema:
        type: string
      x-ms-docs-key-type: chat
    get:
      tags:
      - chats.pinnedChatMessageInfo
      summary: Microsoft Graph Get the number of the resource
      operationId: chats.pinnedMessages.GetCount-ad15
      parameters:
      - $ref: '#/components/parameters/search'
      - $ref: '#/components/parameters/filter'
      responses:
        2XX:
          $ref: '#/components/responses/ODataCountResponse'
        4XX:
          $ref: '#/components/responses/error'
        5XX:
          $ref: '#/components/responses/error'
components:
  schemas:
    ODataCountResponse:
      type: integer
      format: int32
    microsoft.graph.ODataErrors.ErrorDetails:
      required:
      - code
      - message
      type: object
      properties:
        code:
          type: string
        message:
          type: string
        target:
          type: string
          nullable: true
    microsoft.graph.teamworkHostedContent:
      allOf:
      - $ref: '#/components/schemas/microsoft.graph.entity'
      - title: teamworkHostedContent
        required:
        - '@odata.type'
        type: object
        properties:
          contentBytes:
            type: string
            description: Write only. Bytes for the hosted content (such as images).
            format: base64url
            nullable: true
          contentType:
            type: string
            description: Write only. Content type. such as image/png, image/jpg.
            nullable: true
          '@odata.type':
            type: string
        discriminator:
          propertyName: '@odata.type'
          mapping:
            '#microsoft.graph.chatMessageHostedContent': '#/components/schemas/microsoft.graph.chatMessageHostedContent'
    microsoft.graph.identitySet:
      title: identitySet
      required:
      - '@odata.type'
      type: object
      properties:
        application:
          anyOf:
          - $ref: '#/components/schemas/microsoft.graph.identity'
          - type: object
            nullable: true
          description: Optional. The application associated with this action.
        device:
          anyOf:
          - $ref: '#/components/schemas/microsoft.graph.identity'
          - type: object
            nullable: true
          description: Optional. The device associated with this action.
        user:
          anyOf:
          - $ref: '#/components/schemas/microsoft.graph.identity'
          - type: object
            nullable: true
          description: Optional. The user associated with this action.
        '@odata.type':
          type: string
      discriminator:
        propertyName: '@odata.type'
        mapping:
          '#microsoft.graph.aiInteractionMentionedIdentitySet': '#/components/schemas/microsoft.graph.aiInteractionMentionedIdentitySet'
          '#microsoft.graph.chatMessageFromIdentitySet': '#/components/schemas/microsoft.graph.chatMessageFromIdentitySet'
          '#microsoft.graph.chatMessageMentionedIdentitySet': '#/components/schemas/microsoft.graph.chatMessageMentionedIdentitySet'
          '#microsoft.graph.chatMessageReactionIdentitySet': '#/components/schemas/microsoft.graph.chatMessageReactionIdentitySet'
          '#microsoft.graph.communicationsIdentitySet': '#/components/schemas/microsoft.graph.communicationsIdentitySet'
          '#microsoft.graph.engagementIdentitySet': '#/components/schemas/microsoft.graph.engagementIdentitySet'
          '#microsoft.graph.sharePointIdentitySet': '#/components/schemas/microsoft.graph.sharePointIdentitySet'
    microsoft.graph.identity:
      title: identity
      required:
      - '@odata.type'
      type: object
      properties:
        displayName:
          type: string
          description: The display name of the identity.For drive items, the display name might not always be available or up to date. For example, if a user changes their display name the API might show the new value in a future response, but the items associated with the user don't show up as changed when using delta.
          nullable: true
        id:
          type: string
          description: Unique identifier for the identity or actor. For example, in the access reviews decisions API, this property might record the id of the principal, that is, the group, user, or application that's subject to review.
          nullable: true
        '@odata.type':
          type: string
      discriminator:
        propertyName: '@odata.type'
        mapping:
          '#microsoft.graph.azureCommunicationServicesUserIdentity': '#/components/schemas/microsoft.graph.azureCommunicationServicesUserIdentity'
          '#microsoft.graph.communicationsApplicationIdentity': '#/components/schemas/microsoft.graph.communicationsApplicationIdentity'
          '#microsoft.graph.communicationsApplicationInstanceIdentity': '#/components/schemas/microsoft.graph.communicationsApplicationInstanceIdentity'
          '#microsoft.graph.communicationsEncryptedIdentity': '#/components/schemas/microsoft.graph.communicationsEncryptedIdentity'
          '#microsoft.graph.communicationsGuestIdentity': '#/components/schemas/microsoft.graph.communicationsGuestIdentity'
          '#microsoft.graph.communicationsPhoneIdentity': '#/components/schemas/microsoft.graph.communicationsPhoneIdentity'
          '#microsoft.graph.communicationsUserIdentity': '#/components/schemas/microsoft.graph.communicationsUserIdentity'
          '#microsoft.graph.emailIdentity': '#/components/schemas/microsoft.graph.emailIdentity'
          '#microsoft.graph.initiator': '#/components/schemas/microsoft.graph.initiator'
          '#microsoft.graph.provisionedIdentity': '#/components/schemas/microsoft.graph.provisionedIdentity'
          '#microsoft.graph.provisioningServicePrincipal': '#/components/schemas/microsoft.graph.provisioningServicePrincipal'
          '#microsoft.graph.provisioningSystem': '#/components/schemas/microsoft.graph.provisioningSystem'
          '#microsoft.graph.servicePrincipalIdentity': '#/components/schemas/microsoft.graph.servicePrincipalIdentity'
          '#microsoft.graph.sharePointIdentity': '#/components/schemas/microsoft.graph.sharePointIdentity'
          '#microsoft.graph.teamworkApplicationIdentity': '#/components/schemas/microsoft.graph.teamworkApplicationIdentity'
          '#microsoft.graph.teamworkConversationIdentity': '#/components/schemas/microsoft.graph.teamworkConversationIdentity'
          '#microsoft.graph.teamworkTagIdentity': '#/components/schemas/microsoft.graph.teamworkTagIdentity'
          '#microsoft.graph.teamworkUserIdentity': '#/components/schemas/microsoft.graph.teamworkUserIdentity'
          '#microsoft.graph.userIdentity': '#/components/schemas/microsoft.graph.userIdentity'
          '#microsoft.graph.callRecords.userIdentity': '#/components/schemas/microsoft.graph.callRecords.userIdentity'
    microsoft.graph.chatMessageHostedContent:
      allOf:
      - $ref: '#/components/schemas/microsoft.graph.teamworkHostedContent'
      - title: chatMessageHostedContent
        required:
        - '@odata.type'
        type: object
        properties:
          '@odata.type':
            type: string
      x-ms-discriminator-value: '#microsoft.graph.chatMessageHostedContent'
    microsoft.graph.chatMessagePolicyViolationPolicyTip:
      title: chatMessagePolicyViolationPolicyTip
      required:
      - '@odata.type'
      type: object
      properties:
        complianceUrl:
          type: string
          description: The URL a user can visit to read about the data loss prevention policies for the organization. (ie, policies about what users shouldn't say in chats)
          nullable: true
        generalText:
          type: string
          description: Explanatory text shown to the sender of the message.
          nullable: true
        matchedConditionDescriptions:
          type: array
          items:
            type: string
            nullable: true
          description: The list of improper data in the message that was detected by the data loss prevention app. Each DLP app defines its own conditions, examples include 'Credit Card Number' and 'Social Security Number'.
        '@odata.type':
          type: string
    microsoft.graph.chatMessagePolicyViolationDlpActionTypes:
      title: chatMessagePolicyViolationDlpActionTypes
      enum:
      - none
      - notifySender
      - blockAccess
      - blockAccessExternal
      type: string
      x-ms-enum-flags:
        isFlags: true
    microsoft.graph.itemBody:
      title: itemBody
      required:
      - '@odata.type'
      type: object
      properties:
        content:
          type: string
          description: The content of the item.
          nullable: true
        contentType:
          anyOf:
          - $ref: '#/components/schemas/microsoft.graph.bodyType'
          - type: object
            nullable: true
          description: The type of the content. Possible values are text and html.
        '@odata.type':
          type: string
    microsoft.graph.chatMessageActions:
      title: chatMessageActions
      enum:
      - reactionAdded
      - reactionRemoved
      - actionUndefined
      - unknownFutureValue
      type: string
      x-ms-enum-flags:
        isFlags: true
    microsoft.graph.chatMessagePolicyViolationVerdictDetailsTypes:
      title: chatMessagePolicyViolationVerdictDetailsTypes
      enum:
      - none
      - allowFalsePositiveOverride
      - allowOverrideWithoutJustification
      - allowOverrideWithJustification
      type: string
      x-ms-enum-flags:
        isFlags: true
    microsoft.graph.channelIdentity:
      title: channelIdentity
      required:
      - '@odata.type'
      type: object
      properties:
        channelId:
          type: string
          description: The identity of the channel in which the message was posted.
          nullable: true
        teamId:
          type: string
          description: The identity of the team in which the message was posted.
          nullable: true
        '@odata.type':
          type: string
    microsoft.graph.teamworkConversationIdentity:
      allOf:
      - $ref: '#/components/schemas/microsoft.graph.identity'
      - title: teamworkConversationIdentity
        required:
        - '@odata.type'
        type: object
        properties:
          conversationIdentityType:
            anyOf:
            - $ref: '#/components/schemas/microsoft.graph.teamworkConversationIdentityType'
            - type: object
              nullable: true
            description: 'Type of conversation. The possible values are: team, channel, chat, and unknownFutureValue.'
          '@odata.type':
            type: string
            default: '#microsoft.graph.teamworkConversationIdentity'
      x-ms-discriminator-value: '#microsoft.graph.teamworkConversationIdentity'
    microsoft.graph.ODataErrors.InnerError:
      title: InnerError
      required:
      - '@odata.type'
      type: object
      properties:
        request-id:
          type: string
          description: Request Id as tracked internally by the service
          nullable: true
        client-request-id:
          type: string
          description: Client request Id as sent by the client application.
          nullable: true
        date:
          pattern: ^[0-9]{4,}-(0[1-9]|1[012])-(0[1-9]|[12][0-9]|3[01])T([01][0-9]|2[0-3]):[0-5][0-9]:[0-5][0-9]([.][0-9]{1,12})?(Z|[+-][0-9][0-9]:[0-9][0-9])$
          type: string
          description: Date when the error occured.
          format: date-time
          nullable: true
        '@odata.type':
          type: string
    microsoft.graph.chatMessagePolicyViolationUserActionTypes:
      title: chatMessagePolicyViolationUserActionTypes
      enum:
      - none
      - override
      - reportFalsePositive
      type: string
      x-ms-enum-flags:
        isFlags: true
    microsoft.graph.pinnedChatMessageInfoCollectionResponse:
      title: Collection of pinnedChatMessageInfo
      type: object
      allOf:
      - $ref: '#/components/schemas/BaseCollectionPaginationCountResponse'
      - type: object
        properties:
          value:
            type: array
            items:
              $ref: '#/components/schemas/microsoft.graph.pinnedChatMessageInfo'
    microsoft.graph.eventMessageDetail:
      title: eventMessageDetail
      required:
      - '@odata.type'
      type: object
      properties:
        '@odata.type':
          type: string
      discriminator:
        propertyName: '@odata.type'
        mapping:
          '#microsoft.graph.callEndedEventMessageDetail': '#/components/schemas/microsoft.graph.callEndedEventMessageDetail'
          '#microsoft.graph.callRecordingEventMessageDetail': '#/components/schemas/microsoft.graph.callRecordingEventMessageDetail'
          '#microsoft.graph.callStartedEventMessageDetail': '#/components/schemas/microsoft.graph.callStartedEventMessageDetail'
          '#microsoft.graph.callTranscriptEventMessageDetail': '#/components/schemas/microsoft.graph.callTranscriptEventMessageDetail'
          '#microsoft.graph.channelAddedEventMessageDetail': '#/components/schemas/microsoft.graph.channelAddedEventMessageDetail'
          '#microsoft.graph.channelDeletedEventMessageDetail': '#/components/schemas/microsoft.graph.channelDeletedEventMessageDetail'
          '#microsoft.graph.channelDescriptionUpdatedEventMessageDetail': '#/components/schemas/microsoft.graph.channelDescriptionUpdatedEventMessageDetail'
          '#microsoft.graph.channelRenamedEventMessageDetail': '#/components/schemas/microsoft.graph.channelRenamedEventMessageDetail'
          '#microsoft.graph.channelSetAsFavoriteByDefaultEventMessageDetail': '#/components/schemas/microsoft.graph.channelSetAsFavoriteByDefaultEventMessageDetail'
          '#microsoft.graph.channelUnsetAsFavoriteByDefaultEventMessageDetail': '#/components/schemas/microsoft.graph.channelUnsetAsFavoriteByDefaultEventMessageDetail'
          '#microsoft.graph.chatRenamedEventMessageDetail': '#/components/schemas/microsoft.graph.chatRenamedEventMessageDetail'
          '#microsoft.graph.conversationMemberRoleUpdatedEventMessageDetail': '#/components/schemas/microsoft.graph.conversationMemberRoleUpdatedEventMessageDetail'
          '#microsoft.graph.meetingPolicyUpdatedEventMessageDetail': '#/components/schemas/microsoft.graph.meetingPolicyUpdatedEventMessageDetail'
          '#microsoft.graph.membersAddedEventMessageDetail': '#/components/schemas/microsoft.graph.membersAddedEventMessageDetail'
          '#microsoft.graph.membersDeletedEventMessageDetail': '#/components/schemas/microsoft.graph.membersDeletedEventMessageDetail'
          '#microsoft.graph.membersJoinedEventMessageDetail': '#/components/schemas/microsoft.graph.membersJoinedEventMessageDetail'
          '#microsoft.graph.membersLeftEventMessageDetail': '#/components/schemas/microsoft.graph.membersLeftEventMessageDetail'
          '#microsoft.graph.messagePinnedEventMessageDetail': '#/components/schemas/microsoft.graph.messagePinnedEventMessageDetail'
          '#microsoft.graph.messageUnpinnedEventMessageDetail': '#/components/schemas/microsoft.graph.messageUnpinnedEventMessageDetail'
          '#microsoft.graph.tabUpdatedEventMessageDetail': '#/components/schemas/microsoft.graph.tabUpdatedEventMessageDetail'
          '#microsoft.graph.teamArchivedEventMessageDetail': '#/components/schemas/microsoft.graph.teamArchivedEventMessageDetail'
          '#microsoft.graph.teamCreatedEventMessageDetail': '#/components/schemas/microsoft.graph.teamCreatedEventMessageDetail'
          '#microsoft.graph.teamDescriptionUpdatedEventMessageDetail': '#/components/schemas/microsoft.graph.teamDescriptionUpdatedEventMessageDetail'
          '#microsoft.graph.teamJoiningDisabledEventMessageDetail': '#/components/schemas/microsoft.graph.teamJoiningDisabledEventMessageDetail'
          '#microsoft.graph.teamJoiningEnabledEventMessageDetail': '#/components/schemas/microsoft.graph.teamJoiningEnabledEventMessageDetail'
          '#microsoft.graph.teamRenamedEventMessageDetail': '#/components/schemas/microsoft.graph.teamRenamedEventMessageDetail'
          '#microsoft.graph.teamsAppInstalledEventMessageDetail': '#/components/schemas/microsoft.graph.teamsAppInstalledEventMessageDetail'
          '#microsoft.graph.teamsAppRemovedEventMessageDetail': '#/components/schemas/microsoft.graph.teamsAppRemovedEventMessageDetail'
          '#microsoft.graph.teamsAppUpgradedEventMessageDetail': '#/components/schemas/microsoft.graph.teamsAppUpgradedEventMessageDetail'
          '#microsoft.graph.teamUnarchivedEventMessageDetail': '#/components/schemas/microsoft.graph.teamUnarchivedEventMessageDetail'
    microsoft.graph.chatMessage:
      allOf:
      - $ref: '#/components/schemas/microsoft.graph.entity'
      - title: chatMessage
        required:
        - '@odata.type'
        type: object
        properties:
          attachments:
            type: array
            items:
              $ref: '#/components/schemas/microsoft.graph.chatMessageAttachment'
            description: References to attached objects like files, tabs, meetings etc.
          body:
            $ref: '#/components/schemas/microsoft.graph.itemBody'
          channelIdentity:
            anyOf:
            - $ref: '#/components/schemas/microsoft.graph.channelIdentity'
            - type: object
              nullable: true
            description: If the message was sent in a channel, represents identity of the channel.
          chatId:
            type: string
            description: If the message was sent in a chat, represents the identity of the chat.
            nullable: true
          createdDateTime:
            pattern: ^[0-9]{4,}-(0[1-9]|1[012])-(0[1-9]|[12][0-9]|3[01])T([01][0-9]|2[0-3]):[0-5][0-9]:[0-5][0-9]([.][0-9]{1,12})?(Z|[+-][0-9][0-9]:[0-9][0-9])$
            type: string
            description: Timestamp of when the chat message was created.
            format: date-time
            nullable: true
          deletedDateTime:
            pattern: ^[0-9]{4,}-(0[1-9]|1[012])-(0[1-9]|[12][0-9]|3[01])T([01][0-9]|2[0-3]):[0-5][0-9]:[0-5][0-9]([.][0-9]{1,12})?(Z|[+-][0-9][0-9]:[0-9][0-9])$
            type: string
            description: Read only. Timestamp at which the chat message was deleted, or null if not deleted.
            format: date-time
            nullable: true
          etag:
            type: string
            description: Read-only. Version number of the chat message.
            nullable: true
          eventDetail:
            anyOf:
            - $ref: '#/components/schemas/microsoft.graph.eventMessageDetail'
            - type: object
              nullable: true
            description: Read-only. If present, represents details of an event that happened in a chat, a channel, or a team, for example, adding new members. For event messages, the messageType property will be set to systemEventMessage.
          from:
            anyOf:
            - $ref: '#/components/schemas/microsoft.graph.chatMessageFromIdentitySet'
            - type: object
              nullable: true
            description: Details of the sender of the chat message. Can only be set during migration.
          importance:
            $ref: '#/components/schemas/microsoft.graph.chatMessageImportance'
          lastEditedDateTime:
            pattern: ^[0-9]{4,}-(0[1-9]|1[012])-(0[1-9]|[12][0-9]|3[01])T([01][0-9]|2[0-3]):[0-5][0-9]:[0-5][0-9]([.][0-9]{1,12})?(Z|[+-][0-9][0-9]:[0-9][0-9])$
            type: string
            description: Read only. Timestamp when edits to the chat message were made. Triggers an 'Edited' flag in the Teams UI. If no edits are made the value is null.
            format: date-time
            nullable: true
          lastModifiedDateTime:
            pattern: ^[0-9]{4,}-(0[1-9]|1[012])-(0[1-9]|[12][0-9]|3[01])T([01][0-9]|2[0-3]):[0-5][0-9]:[0-5][0-9]([.][0-9]{1,12})?(Z|[+-][0-9][0-9]:[0-9][0-9])$
            type: string
            description: Read only. Timestamp when the chat message is created (initial setting) or modified, including when a reaction is added or removed.
            format: date-time
            nullable: true
          locale:
            type: string
            description: Locale of the chat message set by the client. Always set to en-us.
          mentions:
            type: array
            items:
              $ref: '#/components/schemas/microsoft.graph.chatMessageMention'
            description: 'List of entities mentioned in the chat message. Supported entities are: user, bot, team, channel, chat, and tag.'
          messageHistory:
            type: array
            items:
              $ref: '#/components/schemas/microsoft.graph.chatMessageHistoryItem'
            description: List of activity history of a message item, including modification time and actions, such as reactionAdded, reactionRemoved, or reaction changes, on the message.
          messageType:
            $ref: '#/components/schemas/microsoft.graph.chatMessageType'
          policyViolation:
            anyOf:
            - $ref: '#/components/schemas/microsoft.graph.chatMessagePolicyViolation'
            - type: object
              nullable: true
            description: Defines the properties of a policy violation set by a data loss prevention (DLP) application.
          reactions:
            type: array
            items:
              $ref: '#/components/schemas/microsoft.graph.chatMessageReaction'
            description: Reactions for this chat message (for example, Like).
          replyToId:
            type: string
            description: Read-only. ID of the parent chat message or root chat message of the thread. (Only applies to chat messages in channels, not chats.)
            nullable: true
          subject:
            type: string
            description: The subject of the chat message, in plaintext.
            nullable: true
          summary:
            type: string
            description: Summary text of the chat message that could be used for push notifications and summary views or fall back views. Only applies to channel chat messages, not chat messages in a chat.
            nullable: true
          webUrl:
            type: string
            description: Read-only. Link to the message in Microsoft Teams.
            nullable: true
          hostedContents:
            type: array
            items:
              $ref: '#/components/schemas/microsoft.graph.chatMessageHostedContent'
            description: Content in a message hosted by Microsoft Teams - for example, images or code snippets.
            x-ms-navigationProperty: true
          replies:
            type: array
            items:
              $ref: '#/components/schemas/microsoft.graph.chatMessage'
            description: Replies for a specified message. Supports $expand for channel messages.
            x-ms-navigationProperty: true
          '@odata.type':
            type: string
      x-ms-discriminator-value: '#microsoft.graph.chatMessage'
    microsoft.graph.chatMessageReaction:
      title: chatMessageReaction
      required:
      - '@odata.type'
      type: object
      properties:
        createdDateTime:
          pattern: ^[0-9]{4,}-(0[1-9]|1[012])-(0[1-9]|[12][0-9]|3[01])T([01][0-9]|2[0-3]):[0-5][0-9]:[0-5][0-9]([.][0-9]{1,12})?(Z|[+-][0-9][0-9]:[0-9][0-9])$
          type: string
          description: The timestamp type represents date and time info

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# Full source: https://raw.githubusercontent.com/api-evangelist/microsoft-graph/refs/heads/main/openapi/microsoft-graph-chats-pinnedchatmessageinfo-api-openapi.yml