There are a few "gotchas" when hosting QuickBooks, especially multiple flavors and year versions, in a terminal server environment. While Enterprise may be supported on terminal services, Pro and Premier are not. This is one reason why it's important to work with a hosting service provider who has the experience as well as the support. There are only two companies recognized by Intuit as licensed hosting providers for QuickBooks products: cpaasp.com and rightnetworks.com. You're taking your chances with anyone else.