You
can use
the
Administration tool
to
restore deleted users and to refuse login to
users.
You must have Can administrate
users administrative permission.
To restore a deleted user,
expand
Users and Groups Management, right-click
Users, and select
Deleted users. In the
Deleted
Users dialog box, select the user in the
Restore login column.
To refuse login to a user, expand
Users and Groups Management, right-click
Users, and select Open. In the Users dialog box,
select a user in the Refuse login column.