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.
Updated February 12, 2026: We have updated the timeline and content. Thank you for your patience.
[Introduction]
We’ve extended the migration deadline to give organizations more time to transition. The following capabilities are now supported with Workflows webhooks:
- Posting messages using MessageCard‑formatted payloads (no reformatting required; however, button rendering will not be supported)
- Posting messages to shared channels
These updates significantly reduce migration friction for customers currently using Office 365 Connectors.
[When this will happen:]The migration deadline is extended to April 30, 2026 (previously March 31).
[How this affects your organization:]- Who is affected: Organizations using Office 365 Connectors in Microsoft Teams
[What’s Coming Next:]
Additional details and enhancements — including support for private channels — will be later this month.
If you are currently using Office 365 Connectors in Microsoft Teams:
- Review your existing Office 365 Connector usage.
- Begin migrating to Workflows webhooks as soon as possible.
- Complete migration by April 30, 2026 to avoid service disruption.
No compliance considerations identified, review as appropriate for your organization.
