My company used to allow it, but then it became clear people were doing too many dumb things with their work computers to control them normally. For example, some people would explicitly turn their PCs off without updating the OS every Friday and were nearly a year out of date.
That, plus other security concerns I don't remember surrounding the tightening of our policies for security certifications required to net a very demanding client, made it so that we needed to institute mobile device management (MDM) for everything.
We went with Microsoft's version because there were some crucial things I forgot that only it could do. But it didn't support Linux.
So our few people using Linux had to choose between Windows and Mac OS.