http://blogs.technet.com/b/samdrey/archive/2012/08/28/exchange-2010-how-to-take-traces-using-extra-traces-analysis-by-support-engineers-only.aspx  Go to the Exchange Client Access Server and turn on EXTRA tracing. To do so, take these actions: 1) Go to Start, Run… Type EXTRA 2) Once EXTRA opens, at the Update and Customer Feedback screen, Choose “ Check for Updates on Startup ” and “ I doen-USTelligent Evolution Platform Developer Build (Build: 5.6.50428.7875)