generated: '2026-07-11'
method: searched
source: openapi/microsoft-yammer-openapi.yml
docs: https://learn.microsoft.com/en-us/rest/api/yammer/app-registration
note: Legacy Yammer OAuth 2.0 tokens carry no granular scopes (a token grants full
  access as the authorizing user), and legacy app registrations are restricted as
  of July 1, 2025. Microsoft now directs developers to Entra applications, where
  the Yammer API exposes delegated permissions only — no application permissions
  are supported (https://learn.microsoft.com/en-us/rest/api/yammer/app-registration).
schemes:
- name: OAuth2
  source: openapi/microsoft-yammer-openapi.yml
  flows:
  - flow: authorizationCode
    authorizationUrl: https://www.yammer.com/dialog/oauth
    tokenUrl: https://www.yammer.com/oauth2/access_token.json
  description: Yammer OAuth 2.0 legacy tokens or Microsoft Entra tokens. Delegated access only.
scopes:
- scope: access_as_user
  description: Delegated Entra permission for the Yammer API; allows the application
    to read and write to the Viva Engage (Yammer) platform on behalf of the signed-in
    user. The permission Microsoft's app-registration guide says to select for Entra
    applications calling the legacy Yammer REST APIs.
  sources:
  - https://learn.microsoft.com/en-us/rest/api/yammer/app-registration
- scope: user_impersonation
  description: Delegated Entra permission for the Yammer API used with AAD/Entra
    tokens; allows the application to access the Yammer platform as the signed-in
    user (used by the Yammer-API-with-AAD-tokens flow, requested as
    https://api.yammer.com/user_impersonation).
  sources:
  - https://techcommunity.microsoft.com/blog/viva_engage_blog/yammer-api-with-aad-tokens-postman-collection/857923