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
Source: Microsoft Graph monthly changes. Collection coverage. The publisher supplies a month, not an exact announcement day.
What changed
First observed 19 Oct 2026No field changes in the recorded history.
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