The tdatRootNode object is the top level Teradata object in a directory. If an LDAP authentication and authorization structure for Teradata Vantage users already exists in the directory, the structure contains a tdatRootNode.
A security policy structure also requires a tdatRootNode object. You can configure a RootNode for each policy structure separately from the tdatRootNode for the LDAP authorization structure to allow for separate portability of each structure, but it is not required.