해결됨
I am not sure if anyone is still experiencing these issues. We had a couple of end users who encountered this issue and have a permanent fix to the issue :
1. Uninstall Adobe Pro DC & Creative Cloud,
2. In Registry, clear any registy keys under \HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Adobe\ & \HKEY_CURRENT_USER\SOFTWARE\Adobe\.
3. Re-install Creative Cloud & Adobe Pro DC from Adobe site.
4. If the new version (New Acrobat which does not display toolbars at the top) has been installed, go to Menu, Disable New Acrobat.
5. You will find "Request E-signatures" is now available again along with Fill & Sign.
Enter your E-mail address. We'll send you an e-mail with instructions to reset your password.
