When i am working with my customer with regards to Exchange store event sink, he reported it's not working as expected. There is no issues in the Event viewer and no error it thrown. We tried with Microsoft Exchange Server 2007 environment, the store event sink does not run as expected. Note: The event is triggered, but the registered script is not executed or no file is created. This issue occurs because of some changes in Active Template Library (ATL) 8.0 . To resolve this problem in Exchange Server