Signature filed not showing in adobe acrobat XI

Hello there Adboe community, We have a issue with adobe signature not populating for normal users.

Our environment is server 2012 r2, adobe acrobat xi.

A simple form with signature filed is made.

Admin users on that server can see the signature filed pop up when clicked. But this will not work if a normal user account opens the form and try's to sign it.

UAC is completely disabled.