If a client is no longer active, it is best to terminate the client instead of delete them, this way in the future you can reactivate their account.
1) Enter in the company to terminate under GROUP in the search bar.
2) From the sidebar click the drop down for GROUPS and click GROUP.
3) Click the edit (pencil) icon on the right hand side.
4) Click the drop down for CLIENT and choose TERMINATED.
5) Scroll to the bottom of the page and SAVE GROUP.