Hello @HolySpiritLutheranChurch ,
If you're logged into your account as the owner, you can deactivate and remove Account Managers and Campaign Creators as you see fit. You can also remove any verified addresses on the account you need to as well, as long as they're not being used for the account's main contact or billing addresses.
See also:
Update main account email address
Update account billing email address
... View more
