Terminal Server is installed on this computer. Installing Active Directory Domain Services on this computer will change security ...

Terminal Server is installed on this computer. Installing Active Directory Domain Services on this computer will change security policy on this computer so that only Administrators will be able to log on to the computer. This is done to secure access to the computer. If you wish to allow other users to log on to this computer with Terminal Server, you will need to change the security settings in Group Policy after Active Directory Domain Services has been installed.  If you do not want to run Terminal Server on this computer, click Cancel, then remove Terminal Server using the Remove Roles Wizard in Server Manager.