That combination of things points to one, larger, issue. There’s a pretty large communication gap between IT and business users. The security restrictions that exist are getting in the way of people getting work done, and rather than ask for them to be changed, users simply work around them using their own tools, maybe even their own laptops, or network connections, and the IT folks don’t even know this is happening.
That’s a recipe for disaster. It might be time to work on communicating with your users, and of course when I say “communicate” that absolutely means listening too.