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Can You Remove an Additional onmicrosoft.com Domain in Microsoft 365?
Question details
The user wants to know how to remove an extra onmicrosoft.com domain that was added to their Microsoft 365 tenant.
- Product
- Microsoft 365
- Device & OS
- not provided
- Scenario
- Managing tenant domains and attempting to clean up or delete an unnecessary onmicrosoft.com domain.
- Observed behavior
- Microsoft 365 currently does not allow an added onmicrosoft.com domain to be removed via the admin center or PowerShell.
Note that Microsoft 365 allows a maximum of five onmicrosoft.com domains per tenant. Before making changes, log in to your Microsoft 365 Admin Center with global administrator credentials to review your current domain list.
Set a Different Fallback Domain
Since Microsoft does not allow the deletion of an onmicrosoft.com domain once it is added, the best alternative is to set a different domain as your fallback domain.
By design, Microsoft 365 restricts the removal of any added onmicrosoft.com domains. If you added one by mistake or no longer need it, you cannot delete it using the admin center or PowerShell.
Instead of deleting it, you can add or select a different onmicrosoft.com domain and set it as your fallback domain to ensure the unwanted domain is no longer used as the default routing address.
Navigate to the Microsoft 365 admin center and sign in with your global administrator account.
Go to the 'Settings' menu on the left sidebar and select 'Domains'.
Click on the specific onmicrosoft.com domain that you actually want to use as your primary routing domain.
Click the 'Make fallback' button. This changes your default routing to the preferred domain, effectively sidelining the domain you wanted to remove.
Looking for a Hassle-Free Office Suite? Try WPS Office
Dealing with strict Microsoft 365 admin policies and unchangeable tenant settings can be frustrating. If you need a straightforward, highly compatible office suite without the complex domain administration, WPS Office is the perfect free alternative.
- 1. Download WPS Office: Visit the official WPS Office website and download the free installation package for your operating system.
- 2. Install the Suite: Run the installer and follow the simple on-screen instructions to set up WPS Office on your device.
- 3. Start Creating: Open WPS Office and instantly start creating, editing, and saving your documents in standard Microsoft formats.
Frequently Asked Questions
How many onmicrosoft.com domains can I have?
Microsoft 365 allows you to add up to five onmicrosoft.com domains per tenant. Once this limit is reached, you cannot add more, and because they cannot be deleted, the action is permanent.
Can I remove a custom domain (e.g., mycompany.com) from Microsoft 365?
Yes. Unlike the default onmicrosoft.com domains, custom domains that you have purchased and added to your tenant can be successfully removed through the Settings > Domains menu in the Microsoft 365 admin center.
Will Microsoft ever allow the deletion of onmicrosoft.com domains?
This limitation is currently by design. However, Microsoft community moderators encourage users to vote on the Microsoft Feedback Portal, as high demand may influence the Product Team to introduce domain deletion in future updates.
Does WPS Office require a domain configuration?
No, WPS Office is an independent desktop and mobile office suite. You can simply create an account with any standard email address without needing complex enterprise tenant or domain setups.
