Removing Administrators
As the Account Owner, you are responsible for keeping the list of administrators in your site up-to-date. If a user should not longer have administrative access to your site, it's important that you revoke their privileges for security and privacy reasons.
Step-by-step Guide
Go to Site Administration > Users > Permissions > Assign System Roles.
Click on the “Account Administrator” role.
Select the user(s) from the “Existing users” box on the left and click on the “Remove” button
If you not only want to remoke the user’s administrator permissions but want to completely remove them from your Workplace
Go to Site Administration > Users > Browse list of users.
Click on the eye icon or recycle bin icon next to the user in question.
The eye icon will suspend the user. This means they will no longer be able to log in the site. You can re-activate the user at a later time by clicking on the eye icon again.
The recycle bin icon will permanently delete the user. This cannot be undone. You must therefore confirm your action.