Hello We are running Exchange 2007 SP2. I am seeing these errors pop up quite frequently now: The test credentials cannot be used to test Outlook Web Access.The initial event reported:The test mailbox was not initialized. Run new-TestCasConnectivityUser.ps1 to ensure that the test mailbox is created. Then run Test-ActiveSyncConnectivity ?ResetTestAccountCredentials under a system account to store this users credentials for use in testing the Client Access services Does anyone know what is causing this? How do I find out what the test mailbox used was? Perhaps it was deleted?

Hello, If you have any ActiveSync issue, you can use RCA tool because it will be more specific to help you find the root cause: https://www.testexchangeconnectivity.com/ Thanks, Simon