Android COPE devices suddenly lose Intune user registration while remaining compliant

We are seeing an issue on multiple Android Enterprise Corporate-Owned Work Profile devices that were previously working correctly.

Outlook is configured through Intune to only allow the enrolled user’s own UPN. Suddenly, affected users are logged out of Outlook. When they try to add the account again, Outlook shows the literal variable:

{{userprincipalname}}

instead of the user’s actual username.

This suggests Outlook is no longer receiving the enrolled user identity from Intune.

When opening the Microsoft Intune app in the work profile, we see a similar problem. The Intune app no longer recognizes the user registration and tells the user to register using Company Portal.

However, the devices are still healthy in the Intune admin center:

• Corporate-Owned Work Profile
• Correct primary user
• Recently checked in
• Compliant
• Microsoft Entra registered
• Policies are still being received

Other reference devices with the same Android 17 July update are working correctly, so it does not appear to be a general Android update issue.

So far, the usual troubleshooting has not resolved it. The MDM enrollment itself appears intact, but the local Intune/Entra user registration or authentication broker connection seems to be broken.

Has anyone seen this recently?

Did you find a way to restore the Intune user registration without factory-resetting and re-enrolling the device?