Trigger Wcf service whenever change in Exchange server

Hi Sir/Madam,



                      I am a C# developer currently stuck at a requirement where I need to get my WCF service informed whenever there is a change in a Exchange server. Currently I am using EWS Version 2.0 and I have used "SyncFolderItems" method to get the changed items only from the folder. But for this I have to loop through all the folders and find the changed items. Is there any way to inform a wcf service whenever there is a change in the Exchange server for any mailbox and any folder. Any help will be greatly appreciated.



Thanks in advance,