check before: 2025-09-30
Product:
Microsoft 365 Apps, Outlook, Teams
Platform:
Developer, Online, Web, World tenant
Status:
Change type:
Feature update, User impact, Admin impact
Links:
Details:
Summary:
Microsoft Teams is transitioning to the secure cloud.microsoft domain by September 2025, enhancing security with Microsoft's exclusive top-level domain. Users will be auto-redirected with no action needed. Admins should update references, educate users, and ensure network access to *.cloud.microsoft. Compliance impact is minimal.
Details:
[Introduction]
To improve security and trust across Microsoft cloud services, Microsoft introduced the cloud.microsoft domain in early 2023. This unified, dedicated DNS domain space hosts Microsoft's first-party authenticated SaaS products and experiences.
As part of this transition, Microsoft Teams is now available at https://teams.cloud.microsoft, in parallel with its previous domain. This change enhances security by using Microsoft's exclusive top-level domain, .microsoft, which helps prevent spoofing and builds user trust.
Learn more by reading the 2023 blog post Introducing cloud.microsoft: a unified domain for Microsoft 365 apps and services.
[When this will happen:]
Microsoft Teams is already available at cloud.microsoft. Redirection from the previous domain will begin gradually over the coming months.
Change Category:
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Scope:
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Release Phase:
Created:
2025-09-30
updated:
2025-09-30
Task Type
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Docu to Check
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MS How does it affect me
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summary for non-techies**
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Direct effects for Operations**
User Redirection Issues
Users may experience confusion or frustration if they are not aware of the new domain and its implications, potentially leading to a negative user experience.
- roles: End Users, IT Support Staff
- references: https://support.microsoft.com/office/what-is-cloud-microsoft-7ba4c8b9-d062-4444-84a5-fca6c3006d2b
Network Configuration Problems
If the new domain (*.cloud.microsoft) is blocked on the enterprise network, users will be unable to access Microsoft Teams, leading to disruptions in communication and collaboration.
- roles: Network Administrators, End Users
- references: https://learn.microsoft.com/microsoft-365/enterprise/urls-and-ip-address-ranges
Outdated Documentation
Failure to update internal documentation and references to the old domain may lead to confusion and miscommunication among users, impacting productivity.
- roles: Content Managers, End Users
- references: https://devblogs.microsoft.com/microsoft365dev/action-required-ensure-your-microsoft-teams-apps-are-ready-for-upcoming-domain-changes/
Incompatibility of In-House Apps
In-house Teams apps that are not updated to accommodate the new domain may fail to function properly, causing disruptions in workflows.
- roles: App Developers, End Users
- references: https://devblogs.microsoft.com/microsoft365dev/action-required-ensure-your-microsoft-teams-apps-are-ready-for-upcoming-domain-changes/
User Education Gaps
Without proper education on the new domain, users may not recognize the legitimacy of the new URLs, leading to security concerns and potential phishing risks.
- roles: Training Coordinators, End Users
- references: https://techcommunity.microsoft.com/blog/microsoft_365blog/introducing-cloud-microsoft-a-unified-domain-for-microsoft-365-apps-and-services/3804961
Configutation Options**
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Opportunities**
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Potentional Risks**
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IT Security**
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explanation for non-techies**
Imagine you're used to visiting your favorite coffee shop on Main Street. One day, the shop moves to a new location on Elm Street, but they set up signs and guides to redirect you from the old location to the new one seamlessly. You don't need to do anything differently; you just follow the signs, and you're there.
This is similar to what's happening with Microsoft Teams transitioning to the new cloud.microsoft domain. Microsoft is moving Teams to a new "address" on the internet, which is part of their own exclusive domain, ".microsoft". This change is like moving to a new, more secure neighborhood. The new domain helps protect against impersonation and enhances security, much like how a gated community might offer more security than a regular street.
For users, this transition is straightforward. When you try to access Teams, you'll be automatically redirected to the new domain, just like following the signs to the new coffee shop location. Your bookmarks and links will still work, and you won't need to change anything on your end.
For those managing Teams, like IT admins, it's important to update any internal references to the old domain to the new one to keep everything consistent and avoid confusion. It's also crucial to ensure that your network allows access to the new domain, just like making sure your GPS recognizes the new coffee shop address.
In summary, this change is designed to be smooth and secure, requiring minimal action from users and some updates from administrators to ensure everything continues to run smoothly.
** AI generated content. This information must be reviewed before use.
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