This button is only available for the user that is logged in as ADMIN.
By using this button it is possible for the system administrator to block all users from being able to logon to MONITOR, for example when the system is to be shut down for maintenance or installation of a new update. The administrator can then choose if the block should apply only for the current company or for all companies in the system.
If a user tries to log on while the block is active, a message is displayed saying that logon has been blocked by the system administrator and the user is told to try again later.
After completed maintenance, the administrator can use the same button to remove the block.