Exchange Webservice Managed API - Find items by extended properties
问题 I have tried to use extended properties on appointments with EWS, but I can not seem to find the appointments again. The set property part is equal to the one shown in this question: How to Update an Appointment from Exchange Web Service Managed API 2.0 in ASP.NET When I try to retrieve the appointment, I have followed these examples: http://msdn.microsoft.com/en-us/uc14trainingcourse_5l_topic3#_Toc254008129 http://msdn.microsoft.com/en-us/library/exchange/dd633697(v=exchg.80).aspx But I