Terminal Server Has Exceeded the Maximum Number of Allowed Connections

Open command prompt.

To check which session to reset, see below command line:

query session /server:[server name]

Sample:

query session /server:MyServer2003

Output:

Then, check the ID to be reset and use the command line below:

reset session [ID] /server:MyServer2003

Sample:

reset session 3 /server:MyServer2003

Note: There will be no output after you run this command. Afterwards, try logging in to the server again.