What services does Microsoft AS8075 provide when peering at IXPs?

[Eric A Louie via NANOG <nanog () nanog org>]

I had this question posed by a marketing type in my office.  Does anyone know the answer?
Is it microsoft.com, msdn, outllook365, msn.com, outlook.com, azure, windows updates, xbox?  what else is possibly 
covered or omitted in their peering service?  I suppose we have a customer who is an Azure customer that wants to know 
if their Azure traffic will stay in our network or still go through the Internet.
I've tried asking peering () microsoft com twice, but it looks like they have their ignore filter up.

Thanks, -e-