How to Resolve the “Exceeded Connection Limit” Issue on a Port 3389 Terminal Server
Some customers may encounter the message “The terminal server has exceeded the maximum number of allowed connections” when trying to log in again via port 3389 because they did not properly log off their previous session or for other reasons. Here is a solution to this problem.
There are several ways to resolve this issue. For example, some solutions found on Baidu involve using Group Policy to modify the maximum number of connections, or executing complicated CMD commands. However, these methods require you to be able to log in to the server first.
Here is a method that allows you to force a login without first accessing the server. When your server displays this message, you do not need to worry about restarting the server.
Go to Start → Run, and enter:
mstsc /console /v:ServerName_or_IP_or_Domain
For example:
mstsc /console /v:127.146.171.200