Microsoft Exchange

Microsoft Exchange Mailbox Discovery API

Operations for discovering mailbox structure and content

GitHub OpenAPI

Operations 2

GET /users/{user-id}/mailboxes Microsoft Exchange List mailboxes #
GET /users/{user-id}/mailboxes/{mailbox-id}/folders Microsoft Exchange List mailbox folders #

Documentation

📖
Documentation
https://learn.microsoft.com/en-us/graph/api/resources/mail-api-overview
📖
Authentication
https://learn.microsoft.com/en-us/graph/auth/
📖
GettingStarted
https://developer.microsoft.com/en-us/graph/quick-start
📖
Documentation
https://learn.microsoft.com/en-us/graph/api/resources/calendar
📖
Documentation
https://learn.microsoft.com/en-us/graph/outlook-contacts-concept-overview
📖
Documentation
https://learn.microsoft.com/en-us/graph/people-insights-overview
📖
Documentation
https://learn.microsoft.com/en-us/exchange/reference/admin-api-overview
📖
GettingStarted
https://learn.microsoft.com/en-us/exchange/reference/admin-api-get-started
📖
Authentication
https://learn.microsoft.com/en-us/exchange/reference/admin-api-authentication
📖
Documentation
https://learn.microsoft.com/en-us/graph/mailbox-import-export-concept-overview

Specifications

⚙
OpenAPI
https://raw.githubusercontent.com/api-evangelist/microsoft-exchange/refs/heads/main/openapi/microsoft-exchange-mailbox-discovery-api-openapi.yml

Other Resources

🔗
SDKs
https://learn.microsoft.com/en-us/graph/sdks/sdks-overview
🔗
ChangeLog
https://developer.microsoft.com/en-us/graph/changelog
🔗
Reference
https://learn.microsoft.com/en-us/graph/api/resources/contact?view=graph-rest-1.0
🔗
Reference
https://learn.microsoft.com/en-us/graph/api/user-list-people?view=graph-rest-1.0
🔗
Reference
https://learn.microsoft.com/en-us/graph/api/resources/mailbox-import-export-api-overview?view=graph-rest-beta

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OpenAPI Specification

microsoft-exchange-mailbox-discovery-api-openapi.yml Raw ↑ 
openapi: 3.2.0
info:
  title: Microsoft Exchange Microsoft Graph Mailbox Import Export Mailbox Discovery API
  description: APIs for discovering, importing, and exporting content from Exchange Online mailboxes in full fidelity through the Microsoft Graph beta endpoint. Enables mailbox migration scenarios and content copying as a replacement for EWS-based approaches. Supports importing and exporting mailbox content including messages, calendar events, and contacts while preserving all metadata and properties.
  version: 0.1.0-beta
  contact:
    name: Microsoft Support
    url: https://support.microsoft.com
    email: support@microsoft.com
  license:
    name: Microsoft API License
    url: https://www.microsoft.com/en-us/legal/terms-of-use
  x-date-modified: '2026-03-04'
servers:
- url: https://graph.microsoft.com/beta
  description: Microsoft Graph beta endpoint (preview)
security:
- oauth2: []
tags:
- name: Mailbox Discovery
  description: Operations for discovering mailbox structure and content
paths:
  /users/{user-id}/mailboxes:
    get:
      operationId: listMailboxes
      summary: Microsoft Exchange List mailboxes
      description: Discover the mailboxes associated with a user, including primary mailbox and archive mailbox information. Returns mailbox metadata needed for import and export operations.
      tags:
      - Mailbox Discovery
      parameters:
      - $ref: '#/components/parameters/UserIdParam'
      responses:
        '200':
          description: Successfully retrieved mailbox information
          content:
            application/json:
              schema:
                type: object
                properties:
                  '@odata.context':
                    type: string
                  value:
                    type: array
                    items:
                      $ref: '#/components/schemas/Mailbox'
        '401':
          $ref: '#/components/responses/Unauthorized'
        '403':
          $ref: '#/components/responses/Forbidden'
        '404':
          $ref: '#/components/responses/NotFound'
  /users/{user-id}/mailboxes/{mailbox-id}/folders:
    get:
      operationId: listMailboxFolders
      summary: Microsoft Exchange List mailbox folders
      description: List all folders in the specified mailbox for content discovery. Returns folder hierarchy with metadata needed for targeted import and export operations.
      tags:
      - Mailbox Discovery
      parameters:
      - $ref: '#/components/parameters/UserIdParam'
      - $ref: '#/components/parameters/MailboxIdParam'
      - $ref: '#/components/parameters/TopParam'
      - $ref: '#/components/parameters/SkipParam'
      responses:
        '200':
          description: Successfully retrieved mailbox folders
          content:
            application/json:
              schema:
                type: object
                properties:
                  '@odata.context':
                    type: string
                  '@odata.nextLink':
                    type: string
                    format: uri
                  value:
                    type: array
                    items:
                      $ref: '#/components/schemas/MailboxFolder'
        '401':
          $ref: '#/components/responses/Unauthorized'
        '403':
          $ref: '#/components/responses/Forbidden'
        '404':
          $ref: '#/components/responses/NotFound'
components:
  parameters:
    UserIdParam:
      name: user-id
      in: path
      required: true
      description: The unique identifier or user principal name
      schema:
        type: string
    SkipParam:
      name: $skip
      in: query
      description: Number of items to skip
      schema:
        type: integer
        minimum: 0
    TopParam:
      name: $top
      in: query
      description: Number of items to return
      schema:
        type: integer
        minimum: 1
    MailboxIdParam:
      name: mailbox-id
      in: path
      required: true
      description: The unique identifier of the mailbox
      schema:
        type: string
  schemas:
    ODataError:
      type: object
      description: OData error response
      properties:
        error:
          type: object
          properties:
            code:
              type: string
            message:
              type: string
            innerError:
              type: object
              properties:
                request-id:
                  type: string
                date:
                  type: string
                  format: date-time
    Mailbox:
      type: object
      description: Represents a user's mailbox
      properties:
        id:
          type: string
          readOnly: true
          description: The mailbox unique identifier
        mailboxType:
          type: string
          enum:
          - primary
          - archive
          description: The type of mailbox
        displayName:
          type: string
          description: Display name of the mailbox
        primarySmtpAddress:
          type: string
          format: email
          description: The primary SMTP address of the mailbox
        totalItemCount:
          type: integer
          description: Total number of items in the mailbox
        totalItemSize:
          type: integer
          description: Total size of all items in bytes
    MailboxFolder:
      type: object
      description: A folder in a mailbox
      properties:
        id:
          type: string
          readOnly: true
          description: The folder unique identifier
        displayName:
          type: string
          description: Display name of the folder
        parentFolderId:
          type: string
          description: The ID of the parent folder
        folderType:
          type: string
          description: The type of folder (e.g. inbox, calendar, contacts)
        childFolderCount:
          type: integer
          description: Number of child folders
        totalItemCount:
          type: integer
          description: Total items in the folder
        unreadItemCount:
          type: integer
          description: Number of unread items
  responses:
    NotFound:
      description: Not found
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/ODataError'
    Forbidden:
      description: Forbidden
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/ODataError'
    Unauthorized:
      description: Unauthorized
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/ODataError'
  securitySchemes:
    oauth2:
      type: oauth2
      description: OAuth 2.0 authorization with Microsoft identity platform
      flows:
        clientCredentials:
          tokenUrl: https://login.microsoftonline.com/{tenant}/oauth2/v2.0/token
          scopes:
            Mailbox.Import: Import content into mailboxes
            Mailbox.Export: Export content from mailboxes
            MailboxFolder.Read: Read mailbox folder information