What is exactly the function of SystemMailbox in Exchange 2003? What happen if it does not exist in MailboxStore?

Ques: What happens if you do not have a proper SystemMailbox{guid}? Ans : If you do not have a fully functioning SystemMailbox{guid} in place, there is a chance that EXOLEDB event sinks will not function. See Section below for more information SystemMailbox{guid} FAQ Consider the following frequently asked questions: http://technet.microsoft.com/en-us/library/aa996235(EXCHG.65).aspx#SystemMailbox Also some more information: Overview of Exchange 2000 Server and Exchange Server 2003 Special Mailboxes http://technet.microsoft.com/en-us/library/aa996235(EXCHG.65).aspx#SystemMailbox Anil

Ya Anil I already read this article but what is :EXOLEDB event sinks ?

Check the link below from MSExchange Team. It will explain the purpose of exoledb. http://msexchangeteam.com/archive/2005/05/11/404826.aspx

Thanks but what about: event sinks? In simple word what is event sinks?

http://searchexchange.techtarget.com/definition/event-sinkMCSE | MCITP - Server 2008 | MCITP - Exchange 2007 | MCTS - Exchange 2010