Limited hotel availability

Reservations at the official Microsoft Build conference hotels are based on a first come, first served basis. If you are unable to see a particular hotel on the Hotel page of your registration, this means that that particular hotel room block has reached capacity, and you must book a reservation at one of hotels that is currently listed as available.

If some of the days are blocked out, this means the hotel has no more available rooms that evening. The Microsoft Build event website shows a complete list of the hotels set aside for the event, while the Microsoft Build registration site only shows which hotels are currently available.