My coworker has no such limitation on the same files. The PDFs were made with InDesign CC 2015. I can make PDFs, but I have the same problem when I open them in Acrobat. I need to add and remove pages in documents. This is a new installation.
I have deadlines next week and this pushes everything off to my very busy coworker.
You are not opening the document in Acrobat. Acrobat could probably assemble or extract documents.
You are opening in Acrobat Reader/Adobe Reader. This CANNOT do those things, so it says "not allowed". This can be pretty confusing; you cannot use Acrobat Reader to check what these are set to.
You are right! I am not familiar with all the changes in the new Acrobat DC and was completely missing the Reader vs Pro as the default was opening Reader. I changed the default to Pro and made sure my shortcuts were Pro as well. The new interface is confusing with the navigation changes and terminology changes...I mean "Page Labels" instead of "Page Numbers????". That one took me a while. But then Acrobat has always been a mish mash of features and terminology and ways to do things. Keep trying.