Hi i have a similar issue. I created a new user on the server. When i open plastic client on the server and enter the credentials of the new user, it allows the user to log in.
On a remote pc in the same network, when i use the same credentials its says "Invalid credentials, Username or password is not valid"
i have ensured that the new user has a license allocated through the command line interface
Other existing users are able to log in on the same remote pc.
thanks