Some users may see a blank Files tab for newly created channels in Microsoft Teams

Title: Some users may see a blank Files tab for newly created channels in Microsoft Teams

User impact: Users may have seen a blank Files tab for newly created channels in Microsoft Teams.

More info: Affected users may have also been unable to attach files from their PC or Super picker in channel posts.

Final status: We identified a recent authorization configuration change that affected access to the Files tab in Microsoft Teams that was causing impact. We reverted the change and validated through our internal testing and with some of the affected users that the impact was remediated.

Scope of impact: Impact was specific to some users served through the affected infrastructure attempting to access the Files tab from newly created Microsoft Teams channels.

Start time: Monday, February 26, 2024, at 11:14 AM UTC

End time: Thursday, February 29, 2024, at 7:00 AM UTC

Root cause: A recent authorization configuration change caused impact with the Files tab in Microsoft Teams.

Next steps:
– We’re continuing to analyze the authorization configuration change to understand the source of the issue and find ways to prevent the impact from reoccurring.

This is the final update for the event.