Schema-root missing from Active Directory   

I am in the process of installing Enterprise Vault 6 extensions for OWA 2000 
on a backend server. I am not able to install the extensions due to the fact 
I am missing the schema-root folder which is needed to hold organizational 
forms that the software needs. This Exchange 2000 organizatoin was a 
migration from Exchange 5.5. What is the schema-root folder used for? Can the 
schema-root folder be re-created?

Thanks

date: Mon, 6 Mar 2006 18:45:26 -0800   author:   sald45