Samsung S8 Exchange Mailbox profile Uninstall

Aloha, 

             we are testing our Sophos central MDM and I wiped my phone, added Sophos Mobile Management and installed the profile with an exchange account. created the account. When i go to uninstall the profile it does not remove the exchange account, as i am trying to simulate a termination of an employee I need to remove the exchange account from the phone. any thoughts on what I am doing wrong?