An overview of Exchange Database utilities
Take a look at the link below for a great overview of the eseutil Exchange DB tool:
http://www.microsoft.com/technet/prodtechnol/exchange/guides/ESEUtil/37e28e6f-d0fe-4650-9fe8-8016fc0ad5a5.mspx?mfr=true
Another useful troubleshooting tool for Exchange is ISINTEG. The link below is a good reference of the usage of the tool:
http://support.microsoft.com/kb/301460/
The basics of ISINTEG are:
Before running ISINTEG ensure that your information store is running and any databases to be checked are dismounted.
Then run:
c:\program files\exchsrvr\bin\isinteg -s servername -test alltests