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I did this once. I can't recall how to do it anymore AND/OR it works differently in Windows 2008 than it did in Windows 2003. I recall it being an Exchange hosting feature.

I would like users to login with their email addresses instead of only with their domain name.

EXAMPLE: User: John Doe User logon name: jdoe@domain.local User logon name (pre-Windows 2000): DOMAIN\jdoe E-mail:

I would like for jdoe to be able to login as

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Got it:

You need to open up "Active Directory Domains and Trusts" management console and right click on the root level, click on "Properties" Add the domain name into the UPN. This step is to allow your customer to login to the common OWA page using their own email address.

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Or you can just use powershell to create your users, it will allow you to set any UPN you want for the user.

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