http://blogs.technet.com/b/ucedsg/archive/2009/05/26/exchange-2010-management-tools.aspxThe largest percentage of helpdesk calls incurred by an organization include DL management, message tracking, changes to personal address book, etc. The annual cost of helpdesk support staff for email for 7500 mailboxes is approx. $20/mailbox accordingen-USTelligent Evolution Platform Developer Build (Build: 5.6.50428.7875)http://blogs.technet.com/b/ucedsg/archive/2009/05/26/exchange-2010-management-tools.aspx#3245758Tue, 26 May 2009 17:36:30 GMTd5e57398-b9ef-4490-9955-07cbb4e4a80d:3245758Blogs from the Microsoft Field<p>The largest percentage of helpdesk calls incurred by an organization include DL management, message tracking</p> <img src="http://blogs.technet.com/aggbug.aspx?PostID=3245758" width="1" height="1">