I threw together a PowerShell script which we can distribute to anyone looking to automate the configuration of Microsoft Exchange EWS as it relates to the CUP integration. It will configure all the Exchange permissions needed for a successful CUP Exchange Calendaring integration for you.
This script has been passed to mainline development, with the hope of integrating it into the CUP product itself. For now, you can access it in the attachments to this discussion. There is a brief (6 minute) recording of the script here:
This is a 1.0 script supported by myself for the time being. If you have any comments or questions, please direct them to this discussion post.