EWS : Lifetime of Synchronization State cookie
问题 I am using the SyncFolderItems operation to synchronize my calendar folder. What is the lifetime of the Synchronization State cookie returned by the SyncFolderItems call? If I use a 40-day old SyncState string (saved in the DB from an earlier call) in the SyncFolderItems Call, will I get back the 40 days worth of data? Or will that Sync State have expired? Also, is SyncState string valid between different versions of Exchange server? (2007 and 2010) ? 回答1: Andy- A 40-day old SyncState string