Teams listChannel Graph API resulting in "Unauthorized error - "Failed to execute Aad backend request GetUsersByObjectIdsRequest"

Clippy · Message par **Clippy** » dim. 01 févr. 2026, 04:33

Clippy · Message par **Clippy** » dim. 01 févr. 2026, 05:33

We are facing the same issue, and the error exist in some of our test tenants and it will thrown by microsoft when we using the application permission to make the request.
The requests with the delegate permission token work without any issue.

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Teams listChannel Graph API resulting in "Unauthorized error - "Failed to execute Aad backend request GetUsersByObjectIdsRequest"

Teams listChannel Graph API resulting in "Unauthorized error - "Failed to execute Aad backend request GetUsersByObjectIdsRequest"

Re: Teams listChannel Graph API resulting in "Unauthorized error - "Failed to execute Aad backend request GetUsersByObjectIdsRequest"