Teams web client users will be redirected to teams.cloud.microsoft

What and why

Microsoft is continuing the transition of Microsoft 365 experiences to cloud.microsoft, a unified, trusted, and dedicated domain for Microsoft first-party authenticated products and services. As part of this transition, Microsoft Teams web client users in your organization will be automatically redirected from teams.microsoft.com to teams.cloud.microsoft.

This is a domain change only. Teams features and functionality are not changing, and no action is required from end users. Existing links and bookmarks that use teams.microsoft.com will continue to be supported.

The rollout that started per previous communication (MC116227) will continue in controlled stages through September 2026. By the end of September 2026, Microsoft plans to complete the redirect for the remaining tenants and remove the remaining rollout exception list. We continue to monitor signals across both domains to ensure continued reliability and performance.

Rollout schedule

Rollout will continue in controlled stages through September 2026, with plans to complete the redirect for the remaining tenants and remove the remaining rollout exception list by the end of September.

Impact on your organization

How this will affect your organization

• Users who open teams.microsoft.com will be redirected automatically to teams.cloud.microsoft.
• Existing links and bookmarks remain supported and redirect appropriately.
• Teams consumer experiences at teams.live.com are not affected by this change.
• Users may notice that the new address ends in .microsoft rather than .com. This is expected; .microsoft is a top-level domain operated exclusively by Microsoft.
• Organizations following standard Microsoft 365 network guidance should generally experience no impact.
• Some Teams web apps may not render or launch correctly if they use an older Teams JavaScript SDK or restrictive domain, X-Frame-Options, Content Security Policy (CSP), authentication, or redirect settings.
• The Teams desktop client can be used if an app has a web-specific domain compatibility issue.

Action required / Recommendations

• Ensure that connections to *.cloud.microsoft are not blocked by client devices, proxies, firewalls, secure web gateways, or other enterprise network controls.
• Update internal documentation and user education that explicitly references teams.microsoft.com. Existing links remain compatible, but updated material can reduce confusion.
• Inform help-desk/support that teams.cloud.microsoft is an expected Microsoft domain.
• If you use the temporary tenant admin control, complete the required app remediation and re-enable the redirect before December 31, 2026.

Application owners should validate the complete application experience under teams.cloud.microsoft. If an issue occurs, capture the tenant ID, affected app and app ID, user impact, timestamp, browser, affected URL, reproduction steps, and relevant network or browser-console details.

If the issue is specific to the Teams web domain, users can use the Teams desktop client while the application owner completes the required update. Contact Microsoft Support if you require assistance.

Developer readiness guidance: https://aka.ms/teams-newdomain-blog-devs

The cloud.microsoft domain has been part of standard Microsoft network guidance for Microsoft 365 domains and service endpoints since April 2023.