Set primary guest domain

Auer Lukas 1

Hey,

Wanted to ask if you guys know a way to change the default domain for guest users in Azure AD (e.g. instead of prefix#EXT#@Company portal .onmicrosoft.com something like prefix@BIGuest .contoso.com)?

I think it would just look a little less cryptic. :)

Looking forward to your responses.

Kind regards,
Lukas

1 answer

JamesTran-MSFT 36,371 Reputation points Microsoft Employee

2021-11-15T21:50:01.603+00:00
anonymous user
Thank you for your post!

Based off your issue, I found another thread with a similar ask - How to change domain name embedded in guest UPNs?

Change User's UPN:

Connect-MsolService Set-MsolUserPrincipalName -UserPrincipalName "prefix#EXT#@domain.onmicrosoft.com" -NewUserPrincipalName "prefix@domain.com"

Note - You have to use a domain that's verified within your Azure AD when running Set-MsolUserPrincipalName. Otherwise, you'll receive the error message below.

If you have any other questions, please let me know.
Thank you for your time and patience throughout this issue.

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JamesTran-MSFT 36,371 Reputation points Microsoft Employee

2021-11-16T17:31:51.273+00:00

anonymous user
I just wanted to check in and see if you had any other questions or if you were able to resolve this issue?

Auer Lukas 1 Reputation point

2021-11-24T19:56:29.25+00:00

Hey @JamesTran-MSFT ,

thanks a lot for your answer.

I don't want to manually assign the new UPN to each guest, but set it as the default domain for guests.
So as soon as a new guest is created, it will be automatically assigned prefix@BIGuest .contoso.com instead of prefix#EXT#@Company portal .onmicrosoft.com.

Does anyone know a solution how to implement this?

Best regards to you all,
Lukas

Auer Lukas 1 Reputation point

2021-12-01T16:16:31.74+00:00

@JamesTran-MSFT

JamesTran-MSFT 36,371 Reputation points Microsoft Employee

2021-12-01T23:43:57.28+00:00

anonymous user
Thank you for your time and patience throughout this, and I apologize for the delayed response!

I reached out to my team and as of right now, the only way to change a user's UPN is manually using Set-MsolUserPrincipalName. If you'd like to have the ability to automate this, I'd recommend leveraging our new User Voice forum and creating a feature request so our engineering team can take a look at implement this.

If you have any other questions, please let me know.
Thank you again for your time and patience throughout this issue.

JamesTran-MSFT 36,371 Reputation points Microsoft Employee

2021-12-09T23:38:28.747+00:00

anonymous user
I just wanted to check in and see if you had any other questions or if you were able to resolve this issue?

If you have any other questions, please let me know.
Thank you for your time and patience throughout this issue.

Please remember to "Accept Answer" if any answer/reply helped, so that others in the community facing similar issues can easily find the solution.
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