Active Directory Forest Schema Version is 56 for Windows Server 2012. The ADPrep /ForestPrep command will set a value for ObjectVersion attribute on Schema partition. Once Active Directory Forest schema is extended by using ADPrep /ForestPrep command, a preliminary check must be performed to make schema has been extended.
Please follow the steps to check the value of objectVersion attribute:
- Run LDP.exe, go to Connection and then click on Bind.
- Click Ok. Next click on View, Tree and then select the following LDAP path from the dropdown list: CN=Schema,CN=Configuration,DC=<DomainName>,DC=<Com>
- Click Ok to run the LDP query against the above LDAP Path.
In Right Pane, check objectVersion: 56 attribute. If it is 56 Admin ADPrep command successfully extended the schema.