Microsoft Outlook · Authentication Profile

Microsoft Outlook Authentication

Authentication

Microsoft Outlook secures its APIs with oauth2 across 1 declared security scheme, as derived from its OpenAPI definitions. OAuth 2.0 is offered via the authorizationCode, clientCredentials, and deviceCode flow(s).

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Methods: oauth2 Schemes: 1 OAuth flows: authorizationCode, clientCredentials, deviceCode API key in:

Security Schemes

oauth2 oauth2
· flows: authorizationCode

Source

Authentication Profile

Raw ↑ 
generated: '2026-06-20'
method: searched
source: openapi/microsoft-graph-mail-api-openapi.yml
docs: https://learn.microsoft.com/en-us/graph/auth/
summary:
  types:
  - oauth2
  oauth2_flows:
  - authorizationCode
  - clientCredentials
  - deviceCode
platform: Microsoft identity platform (Microsoft Entra ID)
token_format: JWT bearer, sent in the Authorization header
consent_models:
  - delegated (user context, /authorize + /token)
  - application (app-only, client credentials, admin consent required)
supported_flows:
  - authorizationCode (with PKCE for public clients)
  - clientCredentials (app-only / daemon)
  - deviceCode (input-constrained devices)
  - onBehalfOf (middle-tier services)
add_in_auth:
  - Nested App Authentication (NAA) — GA across Outlook add-ins (Office.js)
  - Office SSO (getAccessToken)
schemes:
- name: oauth2
  type: oauth2
  flows:
  - flow: authorizationCode
    authorizationUrl: https://login.microsoftonline.com/common/oauth2/v2.0/authorize
    tokenUrl: https://login.microsoftonline.com/common/oauth2/v2.0/token
    scopes: 6
  description: Microsoft identity platform OAuth 2.0 authorization. Supports delegated (user) and application permissions.
  sources:
  - openapi/microsoft-graph-mail-api-openapi.yml
oidc_discovery: well-known/microsoft-outlook-openid-configuration.json
scopes: scopes/microsoft-outlook-scopes.yml