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

Message ID: MC1181996 (Updated)

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:

1. Posting messages using MessageCard‑formatted payloads (no reformatting required; however, button rendering will not be supported)
2. 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.

[What you can do to prepare:]

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.

[Compliance considerations:]

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

Source: Microsoft

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