Marking users as inactive does not remove them from the UI in Agile Planner or older versions of PPM. They will still show in the various dropdown lists and screens. In PPM 10.2, many of the screens were updated to filter out inactive users.
New users should automatically be added as a Resource. ALSO, the "add new users as a resource" option should be removed from the UI. This option should be turned on and removed from the UI so users do not turn it off by mistake.
