I have a unity server (18.104.22.1680-337). Under the Users menu (Edit User Basics) the original entered SMTP address is shown, but grayed out. The customer wants to know how to change the SMTP address. At present, the SMTP address is the defined user Alias appended with the "@" and domain. Leaving the domain portion, how can the portion of the SMTP address be changed (preceeding the @)?