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

Originally posted by Microsoft Nov 3, 2025 Uncategorized 0 Comments

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.

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.

Message ID: MC1181996