Hi, I am trying to use LoadGen 2010 in an environment with hardware load balanced CAS servers + 1 mailbox server (all running Exchange 2010 SP1) I saved a config file and editing the CAS server entries to specify the CAS Array name. That worked fine. Now, I want to run the OWAModule to test that. In the GUI, I select OWAModule (which apparently is the one to use with Exchange 2010 SP1, the OWA2010 module is for Exchange 2010 pre SP1) and these parameters for test user groups: Name: UserGroup1 Client Type: OwaModule ActionProfile: OWA Mailbox Profile: this seems to default to 2MB and doesnt allow selection of anything else PreTestLogon: (have tried with this selected and unselected) Container: this seems pre-populated with a LoadGen OU When I try to initialize the test I get the error: LoadGenWin Error: 0 : 05/04/2011 11:38:28 -- Microsoft.Exchange.Swordfish.SwordfishExceptionInvalidConfiguration: Unable to start mailbox initialization because none of the user group defined has a client type that has InitializeMailbox task implemeted.. at Microsoft.Exchange.Swordfish.TaskEngine.CheckUserGroupsForInit() at Microsoft.Exchange.Swordfish.TaskEngine.BeginInitializeMailboxes() at Microsoft.Exchange.Swordfish.GUI.MailboxInitPage.backgroundWorker_DoWork(Object sender, DoWorkEventArgs e) Not sure what this means or how to fix it ... same error if I try any OWA modules.

BTW, I am using loadgencmd with /t OWA to generate the config file being used for these tests.

Did anyone ever find a solution to this? I'm running into the exact same error. Exchange 2010 SP1 RU3. Thanks in advance!