Posted inMicrosoft Teams

MC1317836: Microsoft Teams Enables Messaging During Background File Uploads

3 minutesPosted inMicrosoft Teams
MWPRO IMPACT SCORE
OPERATIONAL IMPACT
29
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
This is a user experience improvement for Teams chat, changing how file uploads work in the background. Admin impact is low as configuration is not needed, though some communication and documentation updates could be helpful. User impact is moderate since sending messages during file upload alters the chat workflow but is an enhancement rather than a disruption. The urgency is low to moderate, as the update only changes rollout dates and requires no action, but awareness for training materials may be useful.
20
🛡️ Admin Impact
LOW
40
👥 User Impact
MEDIUM
35
⚡ Urgency
MEDIUM
20
🔧 Effort
LOW
ℹ️ WHAT YOU NEED TO KNOW
📌

AT A GLANCE

Teams users will soon be able to keep chatting 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 this change and update any training or support docs mentioning file uploads.
📅

ROLLOUT TIMELINE

Upcoming:
End of October 2026

📢 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 22, 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 end of October 2026 (previously mid-September).

[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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