And it still said 'Sign In' at the top right. Within Acrobat, the UI still said 'Sign In' at the top right. Upon signing in, I was greeted with a prompt telling me that Adobe by default will be collecting user information and that I'd have to go into the Adobe account settings to opt out. I could not use our volume licensed copy of Acrobat without signing in. Even manually checking the registry settings in HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Adobe\Adobe Acrobat\2015\FeatureLockDown\cServices and restarting the PC did not fix it. I was unable to do anything without signing in. Today, with a PDF open, I received the 'You must sign in to activate' prompt.
We have used the customization wizard to apply the license, grant an offline exception, and to disable all services.