Step 1:

       Step 2:    

  Step 3:

                Click 'OK' button to save the setting, it'll take effect next time to launch  'Internet Explorer'.
                 Close Internet Explorer and restart it..  Try logging in

You may not need to do this next step.....Try without it first

 How to Add Server's IP as Trusted Site ?

        Step 1:

           Step 2:

                         Click 'OK' button to save the setting, it'll take effect next time to launch  'Internet Explorer'