I am running Windows 7 Ultimate belonging to a test domain. The "manage default printers" option does not appear on the devices toolbar when I select a printer. I have seen screenshots where the option should be but it is missing. Any ideas?

Hi, This feature is only available in premium editions of Windows 7. It's also only found on laptops and other portable devices that use a battery. See below: Automatically switch default printers between home, work, or schoolVivian Xing - MSFT

Are you saying that Windows 7 Ultimate isn't a premium edition? The very link you posted clearly shows that Ultimate is one of the editions supported.

I am also missing that button and I am running Windows 7 Ultimate 64 on a laptop with a battery. It is constantly changing my default printer and its driving me nuts.

I was missing this a minute ago, however, I reset my Adobe printer to the default printer and suddenly the button appeared. So perhaps you could try changing to a different default printer and that might bring the button back. This "fix" only worked on my laptop, not my desktop, so that fits in with the button only being available on portable devices.