Microsoft has to have a conflict regarding how to proceed with mobile. On one hand, it is first and foremost a software company. Job One is to sell software and its primary focus is supporting Windows–and probably even more so on Windows Phone 7 where Microsoft is competing fiercely with iOS and Android.
And as a company, Microsoft surely wants users to buy Windows phones, but it has to know that at present their market share is fairly minuscule. That’s why when it comes a popular enterprise software package like SharePoint, it has to be conflicted.