In my experience at American universities, Microsoft has been successful in getting contracts with the universities, but students don't actually use their products. There are some students that use Outlook's web interface for email, but most forward everything to their personal Gmail accounts. And
no one uses Office 365 - everyone knows about & uses Google Docs (again, from their personal Gmail accounts).
However, I don't think that what students use in universities really matters when they transition into the corporate world. Even with BYOD, when everything's on the web, you can just require your employees to use a particular productivity suite. So I'm not convinced that using free/discounted education software to gain mindshare among future employees is an effective tactic.