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LeoJohnson-5897 avatar image
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LeoJohnson-5897 asked LeoJohnson-5897 commented

Changing UPN, what risks to expect?

Hi y'all,

So one our sister companies asked us to correct their UPN in the local Active Directory, so they could login in to Teams with the correct UPN.

This is totally new for me, so what could I expect?

What are the risks when changing a UPN?

They only use Teams in Office 365, no other services.

They are using a local Exchange server for mail.
They do not know if they log anywhere else in with the UPN.

Please help me to identify the risks, the do's & don'ts for changing the UPN.

Thanks!

Leo Johnson

azure-active-directorywindows-active-directoryazure-ad-connect
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AndyDavid avatar image
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AndyDavid answered AndyDavid commented

The biggest concern is probably OneDrive:
https://docs.microsoft.com/en-us/onedrive/upn-changes

ALso see:
https://docs.microsoft.com/en-us/azure/active-directory/hybrid/howto-troubleshoot-upn-changes

Otherwise, its pretty straight forward, just be ready to help people logon and/or access Teams...

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They do not use OneDrive!

Maybe only some legacy on-premise stuff, but they do not know it for sure.

So that would maybe only update the user their login is changing, and that's it?

Thanks anyway for your help.

Will read your link in detail tomorrow.

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That's really about it. Anything cached, mobile profiles etc will have to be updated.

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FanFan-MSFT avatar image
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FanFan-MSFT answered LeoJohnson-5897 commented

Hi,

Based on my understanding, you want to change the UPN of users to match their accounts for mail or teams, right?

This situation happens for many companies.
Based on my test, this only changes the user logon name on on-premise AD.
But not sure if there are any Apps that rely on user's UPN.
It will be a better option to change the UPN of a user for test.

Following link for your reference:
https://www.petenetlive.com/KB/Article/0001238

This response contains a third-party link. We provide this link for easy reference. Microsoft cannot guarantee the validity of any information and content in this link.


Bast Regards,

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Thanks for the extra conformation!

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