Unable to change the "credentials of login user" option when creating a connection

Unable to change the "credentials of login user" option when creating a connection

I want to create a new Desk connection where the parameter to use 'credentials of login user' is set to YES. I'm able to create a new connection but am never given the option to change this parameter. Is this a restriction of my user profile, and if so, where do I direct my admin to enable my ability to create these types of connections.