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Unable to Change Existing User’s Username/Primary Email Address in MS365
When logged into the MS365 admin portal as a Global Admin, trying to change an existing user’s username and primary email address, the change fails, and the dialog box shows this error:
An exception of type Microsoft.Online.BOX.Util.Exceptions.InternalException (EXOBadRequest) was thrown
We were able to do this process without issue over the last couple months.
And for clarity, all hosted by Bill Gates. no local AD sync:
MS365 -E3
Exchange
Azure AD - Entra ID
A cloud-based service included in Microsoft 365, delivering scalable messaging and collaboration features with simplified management and automatic updates.
Processes in Microsoft 365 for setting up Office apps, redeeming product keys, and activating licenses.
A cloud-based identity and access management service for securing user authentication and resource access
Locked Question. You can vote on whether it's helpful, but you can't add comments or replies or follow the question.
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Hi @Alan Adkins,
Just checking in to see if the below answer provided by Vasil Michev helped.
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Thanks for your understanding.
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Solution: I had this issue because I was trying to modify the user email with an alternative domain which I had not completed setting up on Exchange. In my case, I had not entered the new DNS entries with my domain registrar for the email domain I was trying to use. Once I had done that, the error went away.
Is the user created in the cloud or synced from AD? If the latter, any changes must be made on-premises.
Other than that, try doing the change via the EAC or PowerShell. If you are getting an error there too (and the user is cloud-created), best open a support case.
thanks for the assist. I am assuming it is a MS issue.
And for clarity, all hosted by Bill Gates. no local AD sync:
MS365 -E3
Exchange
Azure AD - Entra ID
A