For those of you who have been around Great Plains for a while you know that the User Activity window lets you remove users. This is useful for maintenance, left over logins, etc. It's used less since GP introduced the ability for users to log themselves out, but it's still useful.
So, when you go to User Activity in GP 9.0, you'll get a surprise, it's not there! Yes User Activity has moved!
It's now located at Tools->Utilities->System->User Activity.
This was a big enough deal that Microsoft provided a Knowledge Base article (KB913820) explaining where to find the User Activity window now. If you're upgrading to 9.0, this is one less thing you'll have to go looking for.