iTunes Doesn’t Like Outlook

I’ve been slowly rebuilding my main desktop computer for a few days now.  The process has been taking a while because I have to work around needing to use it for, well, work.  It has actually been going quite smoothly, especially considering I haven’t turned off UAC yet.

While installing iTunes I got the strange message below.

iTunes Doesnt Like Outlook
iTunes Doesn't Like Outlook

What puzzles me is why iTunes cares at all about Outlook?  What could Outlook possibly be doing that would cause iTunes a problem?  Is this some obscure Apple bashing on Microsoft?