To manage your applications, you need to click on “Applications” in the navigation menu at the top of the Teamstack dashboard. You are able to deactivate an application that has been added to Teamstack by clicking on the application you wish to deactivate, and then pressing “Edit” and then "Disable". If an application is disabled, it's not possible for any users to log into this application, regardless if it's via FBA or SAML. 

Note: Only users with a role of "Manager" or "Admin" have permission to edit applications.