>I have POLITELY asked Alan Griver to mention the reasons.

Perhaps it is a difference in language/culture, but this does not come across as being polite:

The reply, with hopefully the reasons I ask for, is required now, rather than next month.

(Don't expect me to say to that customer: "MS no longer sees it as a strategic product". The resulting debate might become troublesome.)

I think you should be as honest with your customers as you are requiring of YAG.