Microsoft's “Love” of Linux
Microsoft loves Linux because it makes them money.  I'm not sure why anyone would expect differently.They won't release products like Office for Linux (though a web interface is possible), and they won't move away from Windows-only APIs.  Neither of those actions would have any tangible benefit for the primary users of those produts (Windows users and Windows developers, respectively).Active Directory is so deeply integrated into the Windows stack that it will never come out.  You can authenticate Linux clients against AD, but I doubt they'll be writing a Linux AD server any time soon.  I'd imagine most corporate mail servers also support SMTP/IMAP, and Office365 has a web client.  As far as ActiveSync goes, that hasn't been a thing since 2007.