Note: You must be an "Account Manager" user in ProviderSuite to perform this task. If you do not have access to the Setup tab in the ProviderSuite, please forward these instructions to another user with Account Manager permissions.
Go to The Settings tab
Click on Users in the light blue line
Find the User using the search or scroll down and locate
Click the blue Edit button to the left of the User name
Click the remove user link in the far right column
Then click the update button to the left of the user name to complete.