How to Add UPN suffix in Microsoft Active Directory

How to Add UPN suffix in Microsoft Active Directory?

First, what is a UPN?

The User Principal Name (UPN) suffix is part of the logon name in Active Directory. When you create a logon account, by default it will use the DNS name of your AD domain. Example: Your local domain name phmservices.local. The user that you want to create is WMays therefore, the username would be wmays@phmservices.local. 

However, what if you want it to be something else like wmays@phmservices.com? You can add an alternate UPN or second UPN.

What are some reasons that you might need a second UPN for?

• A future implementation of Office 365
• The internal domain is a domainname.local and you want users to sign in with the domain.com suffix
• New software or a software upgrade that requires the users UPN to match the user’s email address

 How to Add the second UPN?

Open Active Directory Domains and Trusts, right-click Active Directory Domains and Trusts, and then choose Properties.

On the UPN Suffixes tab, in the Alternative UPN Suffixes tab, type the new UPN suffix you want, and then select Add, then click OK.

Note: You can also use powershell