Let me try and explain. Just installed Unity 3.1.5 in a windows 2000 active directory with Exchange 5.5 enviroment. everything seems to be working ok in regards to taking messages lighting lights and things like that, however trying to install the VMO client has been a bear. I first installed VMO on a Desktop computer that is part ot the active diectory domain running windows 2000 pro and office XP, I shut off all anti virus programs, and it seemed to install with no errors. Open outlook and all voice-mails are still an attachment and there is no MMC installed. However under tools all the View mail options are there, there is even shortcut on the tool bar to create a new voice message. When you click on it a new e-mail message apears but again no MMC (I even check to see if Yamaha devices were installed, but no that was not it either). So we though there was some security issues with that Desktop. So the customer brought out his laptop running windows 2000 and office 2000 but his laptop was not part of the Active Directory Domain, I then installed VMO on that machine, but again the same problem. Both times using an administrator account. So I pulled out my laptop running windows 2000 and office 2000, but not connecting to their network , I installed VMO and ran Outlook offline(since I was not connected to my network) and it worked fine. I could create a new voice-message and the MMC was there. Any Ideas what would prevent the MMC from being installed?