Hi I have a problem with Active Directory on a DC, from what I can see active directory is corrupt, esentutl and ntdsutil both give errors when trying to repair. esentutl error -1003 <JET_errinvalidparameter, invalid API parameter. And ntdsutil gets error -1018 <JET_errReadVerifyFailure, checksum error on a database page>. What other tools can I use or what other way can I repair active directory? This is a windows 2003 sbs server and there is another sbs 2008 server on the domain running active directory on it which is a swing box so that 2003 can be upgraded to 2008.