Exchange 2003 meeting request submission, update and cancellation from server-side applications

I recently had a project where part of the functionality was to make meeting room booking functionality against Exchange Server 2003 (I re-invented OWA 🙂 – no, it was just part of the application, integrated with other functionalities), and also to cancel or update the request and do free/busy lookup. It was an ASP.net application, so…

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