When a user is synced from an Identity Provider and assigned to an IDP-synced group that provides product access to a product in Atlassian, trying to revoke the user's product access from their profile returns a generic error message that doesn't provide much information:

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Screenshot showing the behavior: 

Suggestion

Provide a more meaningful error message, explaining that the user is assigned to a synced group that grants product access and that the expected process is to remove them from the synced group on the Identity Provider side.