There's any way to get all the appointments of each room? With EWS I have only found how to do this with the appointments of each calendar but i haven't found how to do it for get all the appointments divided in Rooms.

I want to show the name of every room followed by all his appointments.

Thanks!

If you're talking about a room that has a mailbox in Exchange, then you can just list all appointments in the room's calendar.

But all rooms always have a mailbox by default, no?

I was just confirming that you meant "room" in the sense of a resource mailbox that represents the room. Yes, they all have a mailbox that contains a calendar.

There may be an easier way to accomplish your end goal. Question for you first though, what is the reason you want to see every appointment for every room all at once?