It would be in TDNext, go to the Admin application, and it is on the page for your organization's details. The very first page you see after selecting your BE when Admin first loads up. If you do have the access, that button is along the top of the details page for your organization in Admin.
We do have to grant this for admin users, so if you do not see it let us know. I will also talk to our Professional Services guys for their recommendations on getting users updated as they might have a better solution for you.