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How to Correct a Typo in an onmicrosoft.com Domain Name
Question details
The user needs to correct a typographical error made when creating their initial onmicrosoft.com domain in Microsoft 365.
- Product
- Microsoft 365
- Device & OS
- not provided
- Scenario
- Managing Microsoft 365 tenant domains and establishing a correctly spelled domain for user accounts.
- Observed behavior
- The initial onmicrosoft.com domain was created with a typo and the system does not allow it to be directly renamed or removed.
Ensure you have Global Administrator privileges in the Microsoft 365 admin center before attempting to modify tenant domain configurations.
Add a Correctly Spelled onmicrosoft.com Fallback Domain
Since the original domain cannot be deleted or renamed, you must create a new onmicrosoft.com domain and set it as your fallback.
An onmicrosoft.com domain cannot be removed or renamed after it has been added to a Microsoft 365 tenant. However, Microsoft 365 supports adding up to five onmicrosoft.com domains, allowing you to create a correctly spelled one and use it as your fallback domain.
Navigate to the Microsoft 365 admin center and sign in using your Global Administrator account credentials.
In the left-hand navigation menu, select Settings, and then click on Domains.
Click on 'Add domain' and follow the prompts to create your new, correctly spelled onmicrosoft.com domain.
Once the domain is successfully added and verified, configure it to be the fallback domain for your tenant.
Go to Users > Active users. Select the users assigned to the misspelled domain and update their primary email addresses and aliases to the new domain.
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Frequently Asked Questions
Can I completely delete the misspelled onmicrosoft.com domain?
No, the initial onmicrosoft.com domain created with your Microsoft 365 tenant cannot be deleted or renamed. It remains permanently tied to the tenant for background routing purposes, which is why creating a new fallback domain is the standard workaround.
How many onmicrosoft.com domains can I have in my tenant?
Microsoft 365 currently supports adding up to five onmicrosoft.com domains per tenant. If you reach this limit and need to add another, you would have to delete one of the non-primary additional domains.
Will adding a new domain automatically change my users' login IDs?
No. After adding the new domain, you must manually update the user accounts in the Active Users section to reflect the new domain as their primary email and login ID.
