RE: SMTP Address addition on Exchange 5.5

[Dagmar Neumann]

Highlight configuration container, go to Site Addressing - Properties -
Site Addressing Tab and add another SMTP address. Will ask you in the end
if you want to apply this change to all existing mailboxes. Select 'Yes'
and voila, all done.
 
 

http://www.sunbelt-software.com/ntsysadmin_list_charter.htm