Whenever I send or receive an e-mail in my Exchange account with Outlook 2007, I receive the following message box with caption “Microsoft LDAP Directory”: “Operations error”. I tried posting this in Technet forums, but no one responded. What could be causing this? This is a second install of the Exchange trial, after the first one failed miserably and was uninstalled. There does not appear to be any errors or warnings in my mail server’s event log.