If their prediction is that if Linux starts getting a share of locked-down corporate desktops (think insurance companies, warehouses, big retail, etc) it would

If their prediction is that if Linux starts getting a share of locked-down corporate desktops (think insurance companies, warehouses, big retail, etc) it would make sense to be playing in that field, given that it's a familiar name for people transitioning from tired old Windows XP Embedded or similar. It would be very clever for Microsoft to start offering Office 365 for Linux but only support it on their own distro. And it's understandable; getting that bucket of ugly bolts to work on Linux would be an epic hack job and probably would never be particularly stable on random distros.