Ability Mail Server has been tested and should work fine with Windows Vista 64bit. If you are running the mail server in NT service mode the software will load before the login screen in Windows with a standard service login. If you want to get a tray icon you can achieve this by changing the NT service to log in with your user's Windows login credentials. For details on changing the service login please see
How can I access shared folders on other computers?Whether the icon is present or not you should be able to still access the dialog admin interface by using the start menu or desktop shortcut to start the application. The software will detect that it is running in NT service mode and ask if you want to switch back to application mode or use remote admin to access the admin interface. This is an unconventional way of having the main application be both an NT service and an integrated admin interface. We are currently working on Ability Mail Server 3 that will use a true NT service and separate admin interface. The new admin interface will also be able to control remote mail servers meaning that you can install the admin interface on any computer and access the mail server remotely using the main dialog admin interface just like the the web based remote admin currently available.