I had an extended power outage causing my exchange server to not be shut down cleanly. The server came back just fine and the database was successfully verified. However the HTTP service will now not start. This causes the HTTP Exchange Virtual Server to not start thus causing OWA to not work with a "service unavailable" message displayed to OWA users after authentication.
Here is the error I'm getting in the event logs...
Event ID: 7000
Source: Service Control Manager
The HTTP service failed to start due to the following error.
The specified driver is invalid.
This has a cascade affect culminating in the failure of the W3svc from starting since the HTTP service is one of the dependencies.
I've searched and there is very little info that I can find regarding an invalid driver for HTTP. I'm not sure if I can simply reinstall IIS and then recreate the Exchange OWA virtual directories and application. This is also preventing me from standing down this server as I cannot open the system folders in System Manager .
The environment is this:
Exchange 2003 Std. SP2 with all of the latest patches as of Tuesday the 8th.
Windows Serve 2003 Standard SP2 fully patched
Exchange server is a back-end server with a fully functioning front-end server.
I know front end is working as I stood up another back-end machine and moved all of the mailboxes to that machine. I'd simply shut this one down but I can't move the system roles due to the HTTP problem.
Any ideas would be greatly appreciated.