Companies absolutely run Windows servers. In fact, every single company I've ever worked for (except one very small company) has had them. Usually at a minimum, you will have servers running Active Directory, and perhaps DNS (because AD-integrated DNS zones are useful). Then, more often than not companies are MS Exchange shops, plus Sharepoint is common enough.
Generally people aren't running web servers on Windows, but the internal IT infrastructure world uses a ton of Windows servers.
> Generally people aren't running web servers on Windows, but the internal IT infrastructure world uses a ton of Windows servers.
With good reason I'd note, its a use case which windows is profoundly good at - whereas web servers are not something I would say windows is very good at.
Generally people aren't running web servers on Windows, but the internal IT infrastructure world uses a ton of Windows servers.