Acrobat is the worst. I had to download it to fill in tax forms and suddenly every pdf download triggers a lumbering beast to wake itself up and wrench control of my desktop. It has the feel of scammy shareware from back in the day.
I was in charge of the electronic document management system of a university, and kept having issues with deleting pdf files after opening them. The error said the files were still in use, and exiting Acrobat didn't solve the issue either. Apparently, the background service keeps the file open to upload it, and I had to forcefully close open files just to delete pdf files.
Acrobat is abusing a standard, portable document format, and trying to become synonymous with it, despite being very hostile against users.
What? They're just extending the portability by uploading the files to the cloud so you can view them from anywhere! /s
I'm assuming/hoping that's all it is in whatever this uploading is. Did you find out why it was uploading files, and more importantly, where?
So, we couldn't find any information why it was happening, except after our complain and an update later, the background service started closing files when the Adobe app was exited.
We had tens of thousands of applicant documents, most of them contained personally identifiable information (PII) about future students, those files should not be even stored locally, except for the protected PII storage, yet along being uploaded to a random S3 bucket somewhere to be stolen by hackers.
If you're using Windows and have Adobe installed, just check your running programs and on top you'll see that weird Adobe service that you cannot disable even if you turn off its auto-start feature. Acrobat reader is supposed to be a PDF viewer, why does it even have a background service for f.ck sake.
Why ? PRISM. Where ? Who cares.