Some users can't see images in chats

Incident
November 22, 8:27am

Some users can't see images in chats

Status: closed
Start: November 22, 6:12am
End: November 22, 8:25am
Duration: 2 hours 12 minutes
Affected Components:
Collaboration & Communication Microsoft Teams
Update

November 22, 6:12am

November 22, 6:12am

Title: Some users can't see images in chats
User Impact: Users may be unable to view images in within Microsoft Teams' chats.
Current status: We’re looking into your reported issue and checking for impact to your organization. We'll provide an update within one hour.

Update

November 22, 6:29am

November 22, 6:29am

Current status: We've determined that an authentication configuration issue is resulting in impact. We're deploying an fix to correct the configuration, which we anticipate will resolve the issue.
Scope of impact: Impact is specific to users who are served through the affected infrastructure.
Next update by: Monday, November 22, 2021, at 2:30 PM UTC

Update

November 22, 7:32am

November 22, 7:32am

More info: As a potential workaround, users are able to upload the image as a file and other users could download the image to view.
We've confirmed the storage of the images is unaffected, and once the issue is resolved the previously posted images will render as expected.
Current status: We've determined that an internal service to service authentication configuration, used in the rendering of Teams chat and channel images, is not performing as expected. We're continuing to deploy the fix and estimate that it should complete within the next hour.
Scope of impact: Any user could be affected by this issue.
Start time: Monday, November 22, 2021, at 11:30 AM UTC
Root cause: An internal service to service authentication configuration, used in the rendering of Teams chat and channel images, is not performing as expected.
Next update by: Monday, November 22, 2021, at 3:00 PM UTC

Resolved

November 22, 8:25am

November 22, 8:25am

Title: Users can't view images in chats and channels
User Impact: Users may have been unable to view images within Microsoft Teams' chats and channels.
More info: Additionally, some other scenarios were impacted by this issue: - Users may have experienced delays with calls or meeting recordings being available within SharePoint Online and OneDrive for Business. Users may have received the error 'The recording could not be uploaded and will expire.' - Verbiage that was within the same message as an impacted image would not have returned within Microsoft Teams search.
As a potential workaround, users were able to upload the image as a file and other users could download the image to view.
We've confirmed that the storage of the images was unaffected, and once the issue was resolved, the previously posted images rendered as expected.
Final status: We've deployed the fix and confirmed that the issue is resolved after a period of monitoring. Users may need to switch between chats or scroll up and down within a chat to trigger the re-rendering of the images.
Scope of impact: Any user could have been affected by this issue.
Start time: Monday, November 22, 2021, at 11:30 AM UTC
End time: Monday, November 22, 2021, at 2:25 PM UTC
Preliminary root cause: An internal service to service authentication configuration, used in the rendering of Teams chat and channel images, was not performing as expected.
Next steps: - We're investigating why the authentication configuration started to experience impact and stop the issue from reoccurring. - We're analyzing performance data and trends on the affected systems to help prevent this problem from happening again.
We'll publish a post-incident report within five business days.

Resolved

November 22, 8:25am

November 22, 8:25am

Resolved

Update

November 22, 8:27am

November 22, 8:27am

We've deployed the fix throughout the affected environments and telemetry is showing signs of recovery.
This quick update is designed to give the latest information on this issue.