Applications: added
What Microsoft changed
Month-dated announcementAdded the coopEnforcement property to the authenticationBehaviors resource. Application owners can use it to explicitly test Cross-Origin-Opener-Policy enforcement, temporarily suppress enforcement while remediating an incompatible browser authentication flow, or return to the service default.
API documentation
Related public evidence
- Public source · September 2026Applications (beta): 2 API change passagesShared reference: https://learn.microsoft.com/en-us/graph/api/resources/authenticationbehaviors?view=graph-rest-beta&preserve-view=true
Source: Microsoft Graph monthly changes. Collection coverage. The publisher supplies a month, not an exact announcement day.
What changed
First observed 21 Oct 2026No field changes in the recorded history.
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