Why would I use Windows Server over Linux? [closed]

I try not to comment in 'holy war' discussions, but I'll try to be completely neutral here.

As a sysadmin, I'm a pragmatist. I use whatever works best for what I do. In my infrastructure, I have somewhere between 75-100 Linux machines and two Windows servers. They're the domain controllers for my active directory domain, which I use to authenticate the rest of my Linux machines.

There are directory servers available for Linux that would do what the Windows machines do for me, but it costs the company less to buy licenses and use Active Directory than it would for me to learn to install, configure, and administer those services. There is probably Windows software to perform the other 98% of what I do in Linux, too.

It's cheaper for the company to use what works and what we know, rather than what might work and what we don't know.

Simple answer - for Group Policy. I don't have sufficient Linux exposure to know if there's an equivalent, but I do know that the sheer wealth of useful information available about Group Policy is hard to beat.

Of course, if you don't need Group Policy you are free to make your own choice.