I'm having trouble running the EPA tool on my Exchange 2007 organization. When I run the tool from its GUI, the validation of the server fails, and I get the following error: "... the configured users fails to collect data from at least a subset of configured mailboxes..." When I run the tool from the command line, I get: 20111010_095454: Loading topology with user: domainname\svc_exchanalyzer. 20111010_095455: Find virtual directory Exadmin (Default Web Site) on server MBCLUSTER01. 20111010_095455: VDCn:Exadmin (Default Web Site) 20111010_095455: Validating mailbox permissions for user account provided, please wait... 20111010_095455: Exception occurred while checking Exchange Information Store service on server MBCLUSTER01. 20111010_095455: Error: System.InvalidOperationException: Cannot open MSExchangeIS service on computer 'MBCLUSTER01'. ---> System.ComponentModel.Win32Exception: Access is denied --- End of inner exception stack trace --- at System.ServiceProcess.ServiceController.GetServiceHandle(Int32 desiredAccess) at System.ServiceProcess.ServiceController.GenerateStatus() at System.ServiceProcess.ServiceController.get_Status() at Microsoft.Exchange.Epa.Server.CheckService() 20111010_095456: Thread 3 start processing server MBCLUSTER01 at 10/10/2011 9:54:56 PM. 20111010_095456: Done with server MBCLUSTER01 (0%). 20111010_095456: Thread 3 finish processing server MBCLUSTER01 at 10/10/2011 9:54:56 PM. 20111010_095457: We are done. I've checked the 'Exadmin' virtual directory and the authentication is: Anonymous Authentication: DISABLED; ASP.NET Impersination: DISABLED; Forms Authentication: DISABLED. Thinking that might be an issue, I ENABLED Anonymous Authentication, restarted IIS, and ran the tool again, but received the same results. If I try to browse the Exadmin VD, I get a 401 - Unauthorized:Access is denied due to invalid credentials.

Hi, By default the pool collects data from only a single mailbox on each server at the same time. you can change that settings by modifying the value of "mailboxthreadperserver" in config.xml file located in EPA installation directory, we recommend to keep the value under 20. <system StatistisPerMailbox="No" MailboxThreadPerServer="20"/> Exchange User Profile Analysis for Exchange 2003 and 2007 (Exchange Server Profile Analyzer How to : EPA) http://blogs.technet.com/b/neiljohn/archive/2011/08/02/exchange-user-profile-analysis.aspx Xiu