It is necessary to configure the SESC with the URL to Exchange Web Services (EWS) on the Client Access Server (CAS). This setting is accessed from the SESC Console by clicking on Settings|Exchange Servers. The textbox is labled CAS URL.
Use the following steps to determine the URL to EWS on the CAS server:
1. On the CAS server open Exchange Management Shell and enter the following command:
Get-WebServicesVirtualDirectory |fl identity,internalurl,externalurl
The output is similar to this:
Identity : WIN-P5723T9FPJQ\EWS (Default Web Site)
InternalUrl : https://win-p5723t9fpjq.benexchange2010.internal/EWS/Exchange.asmx
ExternalUrl : https://mail.benexchange2010.internal/ews/exchange.asmx
2. Configure the SESC CAS URL with the value from InternalUrl. In this case https://win-p5723t9fpjq.benexchange2010.internal/EWS/Exchange.asmx.
Environment