MC1194069 – M365 Change Digest

One-line summary

Teams desktop updates will use peer-to-peer Delivery Optimization for faster updates and reduced bandwidth, starting rollout in early December 2025.

Similar updates

Details

Summary

Microsoft Teams will use peer-to-peer update distribution via Delivery Optimization starting December 2025, enabling devices on the same network to share update files. This reduces CDN bandwidth use, speeds updates, and saves up to 30% bandwidth. No admin action is needed, but network policies should allow Delivery Optimization.

Body (from Message Center)

We’re improving the way Microsoft Teams updates are delivered to make collaboration smoother and reduce network load. Teams will now use peer-to-peer (P2P) update distribution through Delivery Optimization (DO), enabling devices on the same network to share update files. This reduces reliance on CDN bandwidth and speeds up update completion.

When this will happen

General Availability (Worldwide): Rollout begins in early December 2025 and is expected to complete by late December 2025.

How this affects your organization

Who is affected: All organizations using Microsoft Teams desktop clients.

What will happen

Teams updates will use Delivery Optimization (DO) for peer-to-peer sharing.
Devices on the same network can share update files, reducing internet bandwidth usage.
Delivery Optimization will combine HTTP sources and peers to ensure updates complete successfully.
Update packages will now download from these sources instead of CDN:
- sb.teams.static.microsoft (non-China clients)
- msteams.sb.dl.delivery.mp.microsoft.com (China clients)
Organizations can expect up to 30% bandwidth savings from P2P sharing.

What you can do to prepare

No admin action is required before rollout.
Ensure your network policies allow Delivery Optimization and P2P sharing.
Review configuration guidance for Delivery Optimization: Configure Delivery Optimization (DO) for Windows | Microsoft Learn
Learn more about Teams P2P update distribution: Making Teams Updates Seamless: Smarter Delivery with Peer-to-Peer download and Scattered Rollouts | Microsoft Teams Blog

Compliance considerations:

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

Raw JSON (for debugging)

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      "Summary": "Microsoft Teams will use peer-to-peer update distribution via Delivery Optimization starting December 2025, enabling devices on the same network to share update files. This reduces CDN bandwidth use, speeds updates, and saves up to 30% bandwidth. No admin action is needed, but network policies should allow Delivery Optimization."
    },
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    "last_modified": "2025-12-10T23:37:05Z",
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