>>> I've pointed to the relevant section in the post, which states benefits of using a Microsoft account.
It states the benefit of using the MS account in relation to Hotmail/Outlook.com accounts, but explains nothing in regards to the benefits for Exchange and other e-mail services. You've pointed to a section of the post that is irrelevant to our concerns.
>>>Understand that making a Microsoft account a requirement is not ideal.
Glad you understand, but especially if it is not ideal, then why is it a requirement? This isn't being answered.
>>>For more details on the design decision, you'd have to contact someone in the Windows Mail team.
To whom and/or what blog should we contact to obtain this information? This is the "supporting Windows 8 Mail" blog correct? I would have expected this to be the place to find out how to support Windows 8 Mail and collaborate, but apparently we were mistaken.