GMS Mail won't recognise user's passwords
I have upgraded from 3.02J to 3.02M and, immediately after the upgrade, NT database users couldn’t log on. The POP server issued an error when the password was submitted.
To make use of the NT User database option with version 3.02.13 (3.02M) you must have a licence for unlimited users (50+) and enable the ‘Use NT database’ option in the GMS Mail Users CPL.
Also, you should put your users into an NT group with the same name as the Internet Domain you want them to be in. Have a look at the ‘Using NT’s User Administrator’ section in the new NTDomain manual for details.