Check that prerequisite software is available. The Directory service must have all its prerequisite software. ADO (which is installed as part of MDAC) and SQL must be installed and be operational.
Check that the EnterpriseVaultDirectory ODBC DSN is set up correctly. The Directory Service depends upon an ODBC System DSN called EnterpriseVaultDirectory. This is added automatically by the Configuration Wizard, but it can be modified by anyone using ODBC from Control Panel. Check that this is configured correctly.
Check that the SQL passwords match. You may see an event informing you that the SQL login has failed. This is because the Directory service depends upon a SQL login ID called EnterpriseVault and an associated password. Ensure that the passwords match. You can use the Administration Console to set the SQL password in Enterprise Manager and the Directory Service.