I have been having some problems with our Exchange 2003 box, users keep losing connectivity with the exchange server. The exchange server does not lose network connectivity, I can RDP to it no problem. The resolution is to restart the information store service. But I am seeing a lot of errors in Event viewer as follows. Event Type:WarningEvent Source:WinMgmtEvent Category:NoneEvent ID:35Date:24/09/2008Time:14:31:44User:N/AComputer:ServerDescription:WMI ADAP was unable to load the ASP.NET performance library because it returned invalid data: 0x0 For more information, see Help and Support Center at http://go.microsoft.com/fwlink/events.asp. _______________________________________________________________________________________ Event Type:WarningEvent Source:WinMgmtEvent Category:NoneEvent ID:40Date:24/09/2008Time:14:31:44User:N/AComputer:Server Description:WMI ADAP was unable to create the object Win32_PerfRawData_ASPNET_ASPNETApplications for Performance Library ASP.NET because error 0x80041001 was returned For more information, see Help and Support Center at http://go.microsoft.com/fwlink/events.asp. _______________________________________________________________________________________ Event Type:WarningEvent Source:MSExchangeIS Public StoreEvent Category:General Event ID:1115Date:24/09/2008Time:16:32:59User:N/AComputer:Server Description:Error 0xfffffbbe returned from closing database table, called from function JTAB_BASE::EcCloseTable on table IndexQ. For more information, click http://www.microsoft.com/contentredirect.asp. ________________________________________________________________________________________ Event Type:WarningEvent Source:MSExchangeIS Public StoreEvent Category:General Event ID:1115Date:24/09/2008Time:16:32:59User:N/AComputer:OTTAWADescription:Error 0xfffffbbe returned from closing database table, called from function JTAB_BASE::EcCloseTable on table Msg. For more information, click http://www.microsoft.com/contentredirect.asp. ___________________________________________________________________________________________ Event Type:ErrorEvent Source:MSExchangeFBPublishEvent Category:General Event ID:8207Date:24/09/2008Time:16:45:55User:N/AComputer:OTTAWADescription:Error updating public folder with free-busy information on virtual machine OTTAWA. The error number is 0x80040115. For more information, click http://www.microsoft.com/contentredirect.asp. There are loads and loads of allthese in the event log ANY HELP AT ALL IS GREATLY APPRECIATED!!!!

Hi, First thing I would suggets you to check RSS and TCP chimney Offload settings which are by default enabledin Windows 2003 SP2 andit normally causes network related issues. Windows 2003 Scalable Networking pack and its possible effects on Exchange http://msexchangeteam.com/archive/2007/07/18/446400.aspx You may experience network-related problems after you install Windows Server 2003 SP2 or the Scalable Networking Pack on a Windows Server 2003-based computer http://support.microsoft.com/kb/936594

I applied the hotfix from the MS article, it hasnt seemed to make much difference.

hi i recomend you to download expba.exe (exchange best practice analyzer) from download.microsoft.com and run it fix the errors you get and as user loose conectivity with the exchange server and you can RDP at the same time the information stores unmount automatically seems to be a typical database related problem try esutil to check to database consistancy

Do you see any events about log replay? When was the last successful backup on the server? If your checkpoint is too deep, the store can dismount. You need to restart the server and ensure a successful backup of exchange completes and truncates transaction logs. The article http://technet.microsoft.com/en-us/library/aa998379(EXCHG.65).aspxdiscusses backing up of Exchange Server 2003 Databases. You can also run Exchange Troubleshooting Assistant. It can be downloaded from http://go.microsoft.com/fwlink/?LinkId=55884. The Microsoft Exchange Troubleshooting Assistant can help to determine the cause of performance, mail flow and database mounting issues on computers running Microsoft Exchange Server. The tool automates specialized troubleshooting steps for identified symptoms.