Migration update for Office 365 connectors retirement in Teams – webhook URL support [MC1181996]

Message ID: MC1181996
[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.

Source: Microsoft

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