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

Microsoft Teams will allow users to send messages while files upload asynchronously in the background, improving real-time collaboration. This update, rolling out worldwide in June 2026, affects all platforms and requires no action. Compliance and file-sharing policies remain unchanged.

[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 mid-June 2026 and is expected to complete by late June 2026.
• General Availability (Worldwide): Rollout will begin in late June 2026 and is expected to complete by late June 2026.

[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.