MC1317836Microsoft Teams: Unblock users to send message while file is uploading in the background

Updated September 2, 2026: We have updated the timeline. Thank you for your patience. 

What and Why

Users are currently blocked from sending messages in Microsoft Teams while a file upload is in progress, which can disrupt real-time collaboration. With this update, file uploads will occur asynchronously in the background, allowing users to continue sending messages without interruption.

This message is associated with Microsoft 365 Roadmap ID 560813.

Rollout Schedule

• Targeted Release: Rollout will begin in early August 2026 (previously early July) and is expected to complete by mid-August 2026 (previously mid-July).
• General Availability (Worldwide): Rollout will begin in mid-August 2026 (previously mid-July) and is expected to complete by mid-September 2026 (previously late August).

Impact on Your Organization

Who is affected

All Microsoft Teams users who send files in chats or channels

Platforms/Services

• Microsoft Teams
• Desktop (Windows, Mac)
• Web
• Mobile (iOS, Android)

What will happen

• Users will be able to send chat messages while files are uploading.
• File uploads will occur asynchronously in the background.
• The message input box will no longer be blocked during uploads.
• There are no changes to how files are stored or shared.
• Existing compliance, retention, and security policies remain unchanged.
• This feature will be enabled by default for all tenants.

Action Required / Recommendations

• No action is required.
• Consider informing your users about improved file upload behavior in Teams chats.
• Update internal training or support documentation if you reference file-sharing workflows.

Compliance considerations

No compliance considerations identified. Review as appropriate for your organization.