Netware 5.1

I'm getting some users with the 8801 error message when trying to log in.

I've had a quick read of the the help notes and found the following,

To free a connection, have a user who is connected to the server log out.
Or, to increase the number of connections allowed for that server, go to a
workstation where a user is connected to the server and has Supervisor
rights, and increase the number of connnections allowed.

How do I increase the number of connections?