How can I determine the correct SOAP XML message format for different Exchange Web Service operations?

You can determine the SOAP XML message format by referring to Microsoft’s official documentation (Exchange Web Service (EWS) Development Guide 2 – SOAP XML Message) or by performing packet capture analysis using Wireshark on the Exchange Server while accessing resources with tools like ewsManage. The captured plaintext communication reveals the XML structure for each operation, such as viewing inbox mail count or retrieving email details.