Here is a little background on this.
Several weeks ago a 5.5 server was transitioned to a new machine running Win2K and Exchange 2000. From what I am told the install did not go well, but eventually everything worked with the exception of OWA. When I got there, if you tried to access OWA you were prompted for credentials. You then received "error: Access is denied". Followed MS KB 317471 for resetting permissions. Now the error is "HTTP/1.1 503 Service Unavailable" after supplying credentials. Incidentally, once I try to log on after closing my browser I no longer get prompted for credentials and just get the 503 service unavailable message.
I then started going through KB 305030 and was stopped when I tried to re-register the dll's. For some reason I regsvr32 would not allow me to register them again. Unfortunately, I didn't writed down the exact error message. Does anyone have a suggestion?