http://blogs.technet.com/b/evand/archive/2007/03/15/alternative-upn-suffixes-and-new-mailbox-gui.aspxSomeone asked me the other day about how to get additional UPN suffixes listed in the UPN suffix dropdown in New Mailbox GUI wizard. My initial instinct was the obvious: Add some additional AD domains to your forest and they'll show up. Of course,en-USTelligent Evolution Platform Developer Build (Build: 5.6.50428.7875)http://blogs.technet.com/b/evand/archive/2007/03/15/alternative-upn-suffixes-and-new-mailbox-gui.aspx#705658Sat, 24 Mar 2007 01:00:44 GMTd5e57398-b9ef-4490-9955-07cbb4e4a80d:705658subject: exchange<p>Disk Performance Testing with Jetstress 2007 Installing Exchange 2007 into a Small Business Server 2003</p> <img src="http://blogs.technet.com/aggbug.aspx?PostID=705658" width="1" height="1">