Today the MSExchangeTransport service was stopped. There is no error in the event viewer. I used to have this service running under the 'local system' account because in the past it was running with the 'Network Service' but it also stopped. My Windows is 2008 x64 SP2 Exchange Server is 2007 SP2. I haven't installed updates recently. Any thoughts?

Can you reboot the server? have you installed in updates recently?Tim Harrington - Catapult Systems - http://HowDoUC.blogspot.com

I've done that but the problem persist. No, I haven't recently, the last one was installed in april 22.

So no events get generated in the Application log if you try to manually start the service? That seems weird.Tim Harrington - Catapult Systems - http://HowDoUC.blogspot.com

Can you tell me what the NTFS permissions are on C:\Program Files\Microsoft\Exchange Server\TransportRoles\data folder is? Might want to try renameing the "data" folder mentioned above to data_old, create a new data folder and restart the service. I believe the Transport service should be running as Network ServiceTim Harrington - Catapult Systems - http://HowDoUC.blogspot.com

That's right, no events are generated in the Application log if I try to manually start the service. Only 2 events in the system log: Event ID : 7000 Type : Error Message : The service Microsoft Exchange Transport service failed to start due to the following error: The service did not respond to the start or control request in a timely fashion. Event ID : 7009 Type : Error Message : Timeout (30000 milliseconds) waiting for the Microsoft Exchange Transport service to connect.

did you try the folder recreation?Tim Harrington - Catapult Systems - http://HowDoUC.blogspot.com

No I didn't, how do you do that? And, is there another place with logs related to the transport service?

Can you tell me what the NTFS permissions are on C:\Program Files\Microsoft\Exchange Server\TransportRoles\data folder is? Might want to try renaming the "data" folder mentioned in the path above to data_old, create a new folder called "data" and restart the service. I believe the Transport service should be running as Network ServiceTim Harrington - Catapult Systems - http://HowDoUC.blogspot.com

I got it! I applied this KB: http://support.microsoft.com/kb/944752/en-us BTW: My server has Internet connectivity, but, for some reason its very slow when I try to navigate. OWA users haven't complaint.

I have done that before (renaming the data folder and restart the service). I did this because I was trying to troubleshoot why the transport service wasn't unable to start under Network Service account. But, it didn't work. The NTFS permissions are (I gave full control to the network service long time ago): System - Full control Network Service - Full control Server\Administrators - Full control Another detail is that I need to disable the Windows firewall to be able to start the Transport Service. Maybe because the Exchange Server is a little slow, and without the firewall the speed of the server increases and the Transport Service needs less time to start, without reaching a timeout.