If a Back Office BO user cannot be deleted and remains visible in the GUI it is possible to remove it from the database.
1. Get the PODS for IDM.
2. Login to the suite IDM pods.
3. Login to PSQL
4. Once logged in and at a postgres=# prompt select the db.
5. The table the users are in is called bo_db_user so you have to execute the command.
6. Deleting a user normally just sets the is_deleted field to "t". If this isn't true after deleting you can change it.
Read the full details and support tip here.