The cause is that one or more users have logged in twice, either on two computers or has left their office computer on and logged in via Terminal Services, VPN, etc. That uses two licenses.
In the past, the only solution has been to go around to all PCs and try to figure out who is logged in twice. Alternatively, to check the server for open files and kill the extra logins.
Worldox has just released a utility for GX3, “Wdinfo,” that tells you who is logged in and what machine. It also notes how many networked (mirrored) logins there are and how many “direct” (that is, via Terminal Services or similar) logins. This makes it possible to track down the extra licenses easily. Since the IT people in most larger firms have access to user computers, it would be fairly simple to connect in and exit out of the extra copy of Worldox.
The utility also gives you other useful information, such as how many unposted items there are (if there are a lot, it could be an indication of a problem with the indexer) and how many records are in the system.
Lastly, you can set it to send you a “Worldox Health” email, say every morning at 8 am, to make sure everything is fine.
Wdinfo is only available with the latest release of GX3 (dated Sept. 12 under Worldox | Help | About).