How to properly solve duplicate upn (private and work)

John Enok Vollestad 6 Reputation points

We have some users that created their own Microsoft account (private) using their email-address from work. In many cases this is the same as the UPN.

Now two years later we have started using our tenant and given the users their microsoft account by their UPN (work).

For the users in questions they now have two different Microsoft accounts with the same UPN. This is of course not ideal.

We have tried to change the email-address of the private account. This did not solve the issue. Have also tried on one account to remove the work-account completely from azure AD, intune and office 365 before we added the user again. This did not solve the issue.

  • When adding a user to a team there is now two versions of the same person. Only one of them is possible to add to the team
  • When trying to migrate (to exchange online) a user that we have tried to clean up this way. The user is not visible as the full name, only the samaccountname

We would really like a recipe for the steps to follow to fix this for the users affected.

Microsoft Entra ID
Microsoft Entra ID
A Microsoft Entra identity service that provides identity management and access control capabilities. Replaces Azure Active Directory.
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  1. AmanpreetSingh-MSFT 56,441 Reputation points

    @John Enok Vollestad You need to rename the personal accounts using below link to use .com instead of

    Note: Once the account is renamed, you cannot revert back this change. Refer to for more details.


    Please "Accept as answer" wherever the information provided helps you to help others in the community.