One of the bigger challenges in some Active Directory environments is controlling who is allowed to log into workstations. By default, every user in AD automatically gets added to Domain Users. Domain Users is, once again by default, included in the local Users group on workstations when the workstations get added to AD. That means that unless you take action on either the user account or the computer configuration, any user account in your AD environment can log into any computer whether you want them to or not. If you’re in a smaller AD environment, this may not be a problem for you: you can go to the Account tab in Active Directory Users and Computers, click the “Log On To…” button and specify the computers the user is allowed to use. However, in a larger environment, managing individual accounts can be very time consuming, especially if you have to manually specify computer names for every single user account that needs limited access. You can also run into ot...