If the maximum number of user licenses in Volume is exceeded, the message ‘There are too many users logged in’ will be displayed when trying to log into Volume. No other user will be able to log into Volume until a user licence becomes available. This issue can arise due to:
If users have left Volume still running, it is possible to clear all connections to free up all user licenses. For SQL LAN based Volume configuration and Volume Remote sites, please contact support@watermarktech.co.uk to clear these connections. For Firebird based Volume configurations, the below instructions can be run to free up all user licenses.
Please Note: This will close ALL connections including any users that are correctly logged in and using the system. Ensure all users are aware the system will be down for a short amount of time and ensure all documents are saved before proceeding.
Stop the Firebird and Firebird Guardian service in Services.

Wait a minute, then start the services again.
Check if users are able to log into Volume again.