MC1181996 – M365 Change Digest

One-line summary

Office 365 Connectors in Teams will retire; migration deadline extended to March 31, 2026. Workflows webhooks gain feature parity by December 2025.

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Details

Summary

The Office 365 Connectors retirement migration deadline in Teams is extended to March 31, 2026. By December 2025, Workflows webhooks will support messageCard payloads and posting to shared/private channels. Organizations should plan their transition accordingly. No compliance issues identified.

Body (from Message Center)

[Introduction]

Update 10/28/2025: New information related to Office 365 Connectors Retirement in Teams – Webhook URL Migration (MC808160). We’ve extended the migration deadline to give organizations more time to transition. We’re also making progress on feature parity for Workflows webhooks.

[When this will happen:]

The migration deadline is extended to March 31, 2026. Feature parity improvements will be available by December 2025.

[How this affects your organization:]

Who is affected: Organizations using Office 365 Connectors in Microsoft Teams.
What will happen:
- Migration deadline extended to March 31, 2026.
- By December 2025, Workflows webhooks will support:
  - Posting messageCard formatted payloads (no need to reformat to Adaptive Cards).
  - Posting messages and Adaptive Cards to shared or private channels.

[What you can do to prepare:]

Plan to transition from Office 365 Connectors to Workflows webhooks by March 31, 2026.
Prepare to use new webhook capabilities starting December 2025.

[Compliance considerations:]

No compliance considerations identified, review as appropriate for your organization.

Raw JSON (for debugging)

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{
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    "action_required_by": "2026-03-30T07:00:00Z",
    "ai_action_required_by": null,
    "ai_actions": [
      "Plan migration from Office 365 Connectors to Workflows webhooks",
      "Prepare to use new webhook features in December 2025"
    ],
    "ai_master_tags": [],
    "ai_model": "gpt-4.1",
    "ai_summary": "Office 365 Connectors in Teams will retire; migration deadline extended to March 31, 2026. Workflows webhooks gain feature parity by December 2025.",
    "ai_topics": [
      "Teams"
    ],
    "category": "planForChange",
    "details_map": {
      "Summary": "The Office 365 Connectors retirement migration deadline in Teams is extended to March 31, 2026. By December 2025, Workflows webhooks will support messageCard payloads and posting to shared/private channels. Organizations should plan their transition accordingly. No compliance issues identified."
    },
    "id": "MC1181996",
    "importance": 5,
    "is_major_change": false,
    "last_modified": "2025-10-31T23:04:14Z",
    "ms_products": [
      "Teams"
    ],
    "platforms": null,
    "roadmap_ids": [],
    "services": [
      "Microsoft Teams"
    ],
    "severity": "normal",
    "tags": [
      "Updated message",
      "User impact",
      "Admin impact",
      "Retirement"
    ],
    "title": "Migration update for Office 365 connectors retirement in Teams \u2013 webhook URL support"
  }
}