NetDocuments does not integrate with Adobe 64bit. A couple of weeks ago, Adobe change the default download to the 64bit version. So if you now install Adobe, it’s 64bit. Here is a couple of ways that will allow you to download the 32bit version of Adobe Pro.
Option 1: Go here: https://helpx.adobe.com/acrobat/kb/acrobat-dc-downloads.html
Once downloaded run x86 version
Option 2: Created Cloud for Teams will allow you to build an install Package with the 32 bit version.