When an account is deprovisioned it no longer appears within the Managed Unit.
By default a deprovisioned user account is no longer a member of any Managed Units or Dynamic Groups. This is by design.
6. Click the Apply option
7. Select OK to close the Managed Unit properties window
8. In order to rebuild a Managed Units membership the Active Roles Administration Service requires a restart
NOTE: If restarting the Active Roles Administration Service is not possible immediately, plan for a scheduled restart to take place after hours.