If during the running of the Enterprise Vault configuration wizard you receive errors indicating that configuring of the Enterprise Vault Monitoring database has failed, complete the configuration wizard and then run the Monitoring Configuration Utility to configure the Monitoring database and the Monitoring agents manually.
For information on how to do this, see the following Enterprise Vault technical note on the Symantec Support Web site:
http://entsupport.symantec.com/docs/287449
The technical note also describes how to troubleshoot issues with Monitoring agents.