On their last day
- Reset their password and sign them out of all sessions from their user page.
- Suspend the user so they can’t sign in. Note that suspended users can still count toward your bill.
- Remove their access on mobile devices from the devices section if they synced work email to a phone.
- Check the apps they connected with “Sign in with Google” and revoke access tokens if needed.
Keep their email and files
- Transfer their Drive files and other data to a teammate. Google offers this when you delete a user, and as a separate data transfer.
- Set up email routing, an alias or delegation so customer emails still reach someone.
- Move ownership of shared calendars and Google Groups they managed.
When nothing more is needed
- Delete the user, or switch them to an archived user license if you must keep the data.
- Record what you did and when.
Menus change. For current click paths, see the official help article.