In exchange 2007 when you mass created mailboxes it would by default set the alias to the username (samaccount) of the user. In exchange 2010 it grabs FirstnameLastname as the alias.
Is there a shell command that you can run to make the mass change to username?
And I cannot set an e-mail address policy as our usernames are the first 7 of the lastname and then the first two of the first name. John Westington would have a username of westingjo.