When samba joins as a second RW DC it should set this attribute.
And on some partition it's msDS-hasMasterNC that is not set.
This is related to replication, multi-dc-setups. Hence this should not block the 4.0.0 release. Moving this to the 4.1 tracking bug....
No 4.1 blocker => 4.2
Any news on this one?
msDS-HasInstantiatedNCs is set, just checked with 4.11