LimitLogin adds the aptitude to limit simultaneous user logins and to remain track of all login data in an Active Directory domain. It is not dependant on your Active Directory Forest or Domain forms. It only wants one Windows Domain Controller for the domain you wish to employ the application on.

Here is how it works according to Microsoft:

“When a user logs on to the domain, the llogin.vbs file sprints and propels the host machine's data (computer name, IP address, meeting ID, and authenticating DC name) to the LimitLogin Web service as XML, employing SOAP. The Web service uses the client's security context alongside Active Directory and ensures to observe if this user is configured for LimitLogin and has a login quota in the LimitLogin application directory partition. If the consumer does not have a login share set, then the Web service informs the script that it should go on to log in usually. If the user does have a login share in place, then the Web service counts the number of registered logins the user has collected in the LimitLogin request directory divider. If the user's login share is less than the actual number of logins registered in Active Directory, then the Web service informs the user's login information in the LimitLogin application directory divider and informs the login script to continue login normally. If the user's login quota is equal to or surpasses the number of logins registered in Active Directory, however, then the Web service informs the login script to log off the present session.”

LimitLogin capabilities include:

Allows you to edge the number of logins per consumer from any machine in the domain, counting Terminal Server sessions.

It will display the login data of any user in the domain along with a specific criterion.
Features simple management and configuration by adding to the Active Directory MMC snap ins.

Has the aptitude to delete and log off user sessions remotely straight from the Active Directory consumers and Computers MMC snap in.

Generates login data news in CSV and XML formats.

LimitLogin supports the following operating systems:

Windows 2000 Professional Service Pack 4 and above

Windows 2000 Server Service Pack 4 and above (counting Terminal Server sessions)

Windows XP Professional Service Pack 1 and above

Windows Server 2003 (counting Terminal Server sessions)