When you cannot restart the directory service on Microsoft Exchange Server 5.0 after it stops for no apparent reason, you may receive an error message citing internal error -1811, with ID: 203017d.
The application log of Event Viewer may display the following events:
Event ID: 1166
Source: MSExchangeDS
Type: Information
Category: Internal Processing
Error -1811 has occurred. JET_errFileNotFound. Internal ID 203017d. Contact Microsoft Technical Support for assistance.
Event ID: 1002
Source: MSExchangeDS
Type: Error
Category: Internal Processing
Description: The Microsoft Exchange Server database, EDB, could not be initialized and returned error -1811. Unrecoverable error. The directory can't continue.