To deprovision a user, click Miscellaneous

Click Deprovisioning

Select an affiliation

More actions → Deprovision user

Search for a user, View user access to deprovision

Select what needs to be deprovisioned, and Deprovision user and remove access

Note, if something shouldn't be configured, you should probably edit the settings on a folder / group / attribute

Under the Miscellaneous menu option you can View deprovisioned users.

To view users who were NOT deprovisioned use the Deprovisioning Report.