It's been ages since I did IT. If I had a user who wanted to run Linux then I knew that, on average, they were going to cause me a lot less headaches with random user issues so I wouldn't mind being flexible. Endpoint security will be different, but a lot of network security is handled through network devices that don't care what the client is.
If I had a user who wanted to run Linux then I knew that, on average, they were going to cause me a lot less headaches with random user issues
In my case, it's the IT team which creates more issues for Linux users.
Whenever they change security policies, they never test it out on Linux and our connection goes down (some VPN/Firewall/DNS policy). It takes ages for us Linux users to convince them that we didn't do any changes on our system and this problem is on their side.
Once, many moons ago, a group of devs at my old work got deny on internal zone-to-zone Firewall open request that they needed for integration between two internal systems, so they ended up making a script that e-mailed the info to a hotmail.com (SMTP was open) account and then wrote a script to login and screenscrape the mail info from hotmail back to the other server (https was open through surf proxy).
My company blocked the Microsoft store. But I convinced the IT guy to make me an admin on my machine so I can install anything I want. I still can't unblock the Microsoft store and no one I can talk to in IT knows how to unblock it. So I have to spend time finding websites that have the software I need (like nugget package explorer or other Microsoft apps that IT doesn't officially support) and hope that the download doesn't kill me.