User management is performed at Admin Panel -> Users, where you can do the following actions:
Searching for users is simple, so we won't cover it here.
Administrators are allowed to change any setting - and a bit more - of a user profile, by clicking in the ''Edit'' link, which will show the same page you see when accessing the profile page from the forum.
Together will all data from the user, an Administrator is allowed to change the user's ''Username'' and force a "special" [Rankings], using the ''Define special ranking'' option.
In JForum it is not possible to delete users, but it is possible to lock an account so that user won't be able to log in or perform any other action. This is different from Banning an user, as banning may not even allow the user to browse the forum, depending of how the ban was done.
To lock an user account click in the checkbox from the "Lock" column, and then click the "Lock / Unlock" button. To unlock, click in the respective checkbox from the "Unlock" column and, again, hit the "Lock / Unlock" button.
Each user may belong to one or many groups, and, when he has two or more groups, the [Permissions] (roles) will be merged. This is specially useful when you currently have a regular user in the, say, "General" group, and want to give him some other special role that is not available to the current group.
To change the relation of groups an user has, click in the "Groups" link and select there the list you want.
In boards where new users are required to validate their email addresses, the Admin Panel -> Users -> Pending Activations interface us a section where the Administrator can see all pending requests and, optionally, activate them. This is useful for situations where the user does not receive the registration email or is having problems with it.
To see all pending activations, go to Admin Panel -> Users -> Pending Activations, where a list will all - if any - pending activations will be shown. You don't have to necessarily activate them, as the user himself is expected to do so, but, if you have to, the interface it's there.
Under Admin Control Panel -> Banning it is possible to exclude users entirely from participating in the forums. It is possible to enter a user ID, or an email address, or an IP address. For an IP, it's possible to use a wildcard such as 192.168.1.*. Be careful when banning by IP - several users can use the same IP, iinwhich case a ban might be too wide. When in doubt, do a user search by IP first, to make sure nobody else is using it. (Unless, of course, banning an entire subnet is the point of the ban.)