Entra ID Connect and UPN on Azure

Question

Hi all,

we have following scenario

• AD Domin on-prem: oldname.local
• Entra ID verified custom Domain: company.cloud
• Entra ID initial domain: company.onmicrosoft.com

We now want to user Entra Id Connect to sync the users from on prem to cloud.

We have done the setup and sync is working, but we want to have a different UPN on Entra ID.

• Current UPN: ******@company.onmicrosoft.com
• We want: user@company.cloud

Is there any option, without changing the UPN on AD, to get that working?

Thanks

Joerg

Answer 1

Hi @Jörg Lang

Thanks for reaching out to Microsoft Q&A.

Unfortunately, Entra ID will use the UPN attribute synced from the On Premises AD, and if that's not a routable domain, it will use the company.onmicrosoft.com domain for Entra ID sign in. The documentation below details that as you may already know:

https://learn.microsoft.com/en-us/entra/identity/hybrid/connect/howto-troubleshoot-upn-changes#upns-in-microsoft-entra-id

I'm not sure if that's your main goal, but if you need your users to sign in with a different username, you could test and use Alternate ID feature that is currently in Preview now. There are some prerequisites and limitations to use it, but depending on your need it might be an option for you.

https://learn.microsoft.com/en-us/entra/identity/hybrid/connect/howto-troubleshoot-upn-changes#upns-in-microsoft-entra-id

Thanks,

Fabio

Answer 2

Hi @Jörg Lang

I 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.

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