Microsoft 365 Alert – Service Degradation – Microsoft Teams – Some users may be unable to view previews of sent images from the Microsoft Teams desktop app – RESOLVED

06/11/2024 13:31:00 AM

NHSmail Reference: INC46726055

Microsoft Reference: TM916087

Issue Status: RESOLVED

Issue Description: Users’ files uploaded to Microsoft Teams channels may be incorrectly hosted on the users’ OneDrive for Business.

More info: Sent previews may appear blank after pasting images into Microsoft Teams chats.

Current Update: 06/01/2025 08:53:00 AM Microsoft have successfully validated the fix and confirmed through their service telemetry that it has been deployed to all affected environments. However, some users may still experience impact. To ensure that these issues no longer persist, they recommend that the Microsoft Teams desktop client is up to date.

Scope of impact: Impact is specific to some users who are served through the affected infrastructure attempting to view previews of sent images from the Microsoft Teams desktop app.

Root cause: A recent update, intended to enable a feature focused on improving image handling in Microsoft Teams chats, inadvertently introduced a code regression causing images to not be checked for successful upload status” before being sent.

Next steps: Microsoft are reviewing their update procedures to better identify similar issues during our development and testing cycles.

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