Creating a DNS forward zone results in an error "eDirectory interaction failure"

Using iManager 2.7 to create a DNS zone on a NetWare 6.5 SP5 server and setting the Zone Type to Forward causes an error to be displayed, "eDirectory interaction failure".

The Zone Type: Forward requires schema extensions that were added in NetWare 6.5 SP7.  Since these schema extensions do not exist on NetWare 6.5 SP5 iManager can't find what it needs to set up the zone as a Forward zone.  The recommended resolution is to upgrade to NetWare 6.5 SP7.