问题
Consider that I have 100,000 messages in a folder. I want to be able to synchronize with latest changes, but I don't need any old messages. Asking for initial synchronization with
SyncFolderItems(..., null /*syncState*/)?
would bring back all 100,000 messages (that I don't need). How can I jump directly to the latest SyncState without reading 100,000 entities from server?
回答1:
You can't work around that. You need to iterate through the collection once. After you have processed all existing entries, the syncstate should be much smaller than your 143kb.
来源：https://stackoverflow.com/questions/7923370/ews-how-to-get-latest-syncstate-without-initial-synchronization