Unfortunately, Enterprise deals are more based on sales skills than technology. Companies like Microsoft tend to have multiple ongoing points of contact with their Enterprise customers such as account managers, technical account managers, professional services consultants etc. These points of contact are (hopefully) doing whatever it is the customer wants them to but are also feeding back intel to their (Microsoft's) sales team(s) all sorts of details about what they see and hear from the customer. Microsoft has had a couple of decades (or more) to burrow deep inside customer organizations that Amazon hasn't.