Hi, This issue is regarding an Exchange Server Error logged as event id 5007. The client in this case is Loadsim 2003 running tests against Exchange Server 2003. We encountered the following error in the event logs: Event Type: Error Event Source: MSExchangeSA Event Category: General Event ID: 5007 Date: 9/2/2010 Time: 4:54:03 PM User: N/A Computer: 2K3-MAPIDT-DC Description: An error occurred during the message tracking decode operation. error from file: f:\tisp2\admin\src\libs\rpc\rwlog.cxx line: 868. <<0xc0070057 - The parameter is incorrect.>> On searching online, I found one link on support web which talks about a similar error on Exchange Server 2000. But in that case, the event source is different. http://support.microsoft.com/kb/308397 I did not much information about what this error is suggesting. It would be great to know what exactly is the problem here. Thanks, Jaideep

Are you running LoadSim against a production machine? That's a no-no.Ed Crowley MVP "There are seldom good technological solutions to behavioral problems."