Is it anti-competitive to use the revenues from one business area to give away products in another business area? Everyone here seems to be saying it is fine to do. To me it is not as clear. If Google did not make a ton of money in ad revenues there is no way they could support Android OS for free. The only reason Google gives away Android is to increase those ad revenues. It is hard to compete with free especially when the free product is produced by a competitive company. It may be there are valid reasons this business model is "fair". But no one is addressing the root issue.

Business customers are paying the $400 to get Outlook not Word. Outlook's calendar is used to schedule most activities in large organizations. So really it is the integration provided by Exchange that people are paying for. If you don't use/need that integration then you are wasting $400.