I am in the central admin of SP2013 onpremise. I logged in as a farm account. I can create webapplications, sitecollections etc. But now I try to create a new service application, but the button is greyed out. What can I do to make it work?
possible solution can be found here:
is the UAC enable? So you have to open the Central Administration from start windows menu instead of opening a browser and type the url of the Central Administration... ...or disable UAC.