Hi Mike,
As you have shared that it just Document Cloud storage that you can not see, so you may follow the instruction mentioned below and check the preferences setting of Adobe Reader DC.
Acrobat Reader>Preferences>General>Basic Tools
Make sure that 1- Show online storage when opening files and 2- Show online storage when saving files in "Checked"
If not, then select these options and press OK
Hope this will resolve the problem.
Regards,
Akanchha