Summary
Details
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.
Change History
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
messageCardformatted payloads (no need to reformat to Adaptive Cards). - Posting messages and Adaptive Cards to shared or private channels.
- Posting
- Plan to transition from Office 365 Connectors to Workflows webhooks by March 31, 2026.
- Prepare to use new webhook capabilities starting December 2025.
No compliance considerations identified, review as appropriate for your organization.
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.
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