‘Available usernames’ shows the sub-user names that are not currently logged into Resdex and are available for use.
You need to be a Super-user to turn this feature ON / OFF. If you turn it ON, you will enable sub-user(s) of your account to see a list of usernames who are not using Resdex. Thus, they can select any of the idle usernames & login to the database.
Please note that you’ll be able to view the list of available sub-users only when you’ve permissions to do so else you’ll need to contact your super-user for this.