Introducing simplified admin controls to manage external collaboration in Teams admin center
From Microsoft 365 Message Center Archive by Merill Fernando · Microsoft may not have sent this notice to your tenant.Rollout
Rollout dates are often only in the text. When Microsoft moves them, the change shows under "What changed".
Schedule dates changed in the text
Date phrases in schedule sentences differ between the versions this installation saw- Seen 18 Feb 2026
mid-February 2026 - Seen 1 Dec 2025
late January 2026, early February 2026→ mid-February 2026, late February 2026
Read from date phrases in Microsoft's text, not from notice metadata. A changed phrase can be a moved rollout, a new milestone or just rewording; "What changed" below shows which.
What the notice says
Microsoft’s text, safely structuredUpdated February 17, 2026: We have updated the timeline. Thank you for your patience.
Introduction
We’re introducing a simplified external collaboration (EC) admin experience in Microsoft Teams to help administrators manage external collaboration settings more efficiently. This update introduces two predefined collaboration modes—Open and Controlled—as well as a Custom mode for organizations with unique requirements. The new experience provides a streamlined interface in the Teams admin center (TAC) for configuring external collaboration policies across chats, calls, meetings, Teams, and channels (including shared channels).
When this will happen
Public Preview: Rolling out mid-November 2025; expected completion by mid-November 2025.
General Availability (Worldwide): Rolling out late February 2026 (previously mid-February); expected completion by late February 2026 (previously early February).
How this affects your organization
Who is affected: Admins managing Microsoft Teams external collaboration settings.
What will happen
- A new admin experience will be available in Teams admin center (TAC).
- Admins can choose from three collaboration modes:
- Existing settings will remain unchanged unless modified by the admin.
Screenshot 1 - A new external collab section and overview page that shows external collab settings at a glance:
Screenshot 2: Manage external collab settings using a guided simple UX:
What you can do to prepare
No action is required at this time. Admins may choose to explore the new interface once available to review and adjust external collaboration settings. For more information, refer to the Teams admin center documentation once the update is live.
Compliance considerations
No compliance considerations identified, review as appropriate for your organization.
What changed
Between archive captures, newest firstUpdated
December 1, 2025:February 17, 2026: We have updated the timeline. Thank you for your patience. Introduction: We’re … mid-November 2025; expected completion by mid-November 2025. General Availability (Worldwide): Rolling outmid-Februarylate February 2026 (previouslylate January);mid-February); expected completion by late February 2026 (previously early February). How this affects …- Tags
New feature, User impact, Admin impact→ Updated message, New feature, User impact, Admin impact
Updated December 1, 2025: We have updated the timeline. Thank you for your patience. Introduction: We’re introducing a simplified external collaboration (EC) admin experience in Microsoft … mid-November 2025; expected completion by mid-November 2025. General Availability (Worldwide): Rolling out mid-February 2026 (previously late
January 2026;January); expected completion byearlylate February2026.2026 (previously early February). How this affects your organization: Who is affected: Admins managing Microsoft Teams …- Tags
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