Posted inMicrosoft Teams

MC1317836: Microsoft Teams Enables Messaging During Background File Uploads

3 minutesPosted inMicrosoft Teams
MWPRO IMPACT SCORE
OPERATIONAL IMPACT
27
0 25 50 75 100
MODERATE IMPACT • ASSESS BUSINESS IMPACT
Recommended Action:
Take a look and decide whether this affects your tenant, users or support teams.
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Primary Audience

Microsoft 365 AdminsTeams AdminsIT ManagersService Owners
Why this score?
AI Confidence
HIGH
Enough detail is available to trust this assessment.
Assessment Reasoning
The update adjusts rollout dates for a Teams feature that improves chat usability during file uploads. Admin impact is low as no configuration is needed, though awareness and possible documentation updates are advised. User impact is moderate because it changes behaviour during file transfers, improving the chat experience but requiring minimal guidance. The urgency is limited to awareness of revised timing rather than immediate action.
20
🛡️ Admin Impact
LOW
40
👥 User Impact
MEDIUM
30
⚡ Urgency
MEDIUM
15
🔧 Effort
LOW
ℹ️ WHAT YOU NEED TO KNOW
📌

AT A GLANCE

Teams will now let users keep sending messages while files upload in the background, improving chat workflow and speed.
👥

END USERS

Users can send messages while files continue uploading in chats or channels.
🛡️

IT ADMINS

Consider notifying users about the change and update any training or support docs mentioning file uploads.
📅

ROLLOUT TIMELINE

Rolling out:
In progress

📢 Official Microsoft Message Center Announcement

(Updated) Microsoft Teams: Unblock users to send message while file is uploading in the background
Message ID: MC1317836 (Updated)

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.

Source: Microsoft Message Center • Analysed by MWPro

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