MC1317836 – M365 Change Digest

One-line summary

Teams will allow users to send messages while files upload in the background, ending message blocking during uploads; rollout starts mid-June 2026 and is enabled by default.

Similar updates

Details

RoadmapIds

560813

Summary

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.

Platforms

Desktop, Mac

Body (from Message Center)

[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.

Raw JSON (for debugging)

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    "action_required_by": null,
    "ai_action_required_by": "2026-06-15T00:00:00Z",
    "ai_actions": [
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      "Update internal documentation if referencing file-sharing workflows"
    ],
    "ai_master_tags": [
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    "ai_summary": "Teams will allow users to send messages while files upload in the background, ending message blocking during uploads; rollout starts mid-June 2026 and is enabled by default.",
    "ai_topics": [
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    "category": "stayInformed",
    "details_map": {
      "Platforms": "Desktop, Mac",
      "RoadmapIds": "560813",
      "Summary": "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."
    },
    "id": "MC1317836",
    "importance": 4,
    "is_major_change": false,
    "last_modified": "2026-05-21T16:16:15Z",
    "ms_products": [
      "Teams"
    ],
    "platforms": "Desktop, Mac",
    "roadmap_ids": [
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    ],
    "services": [
      "Microsoft Teams"
    ],
    "severity": "normal",
    "tags": [
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    ],
    "title": "Microsoft Teams: Unblock users to send message while file is uploading in the background"
  }
}