I have a running Samba4-AD 4.1.11. I joined a other fresh samba 4.1.11 as second DC. The Replicatiion between both DC works fine. Finaly I transfer the fsmo schema role to the second DC and I provision/extend the openchange Schema to it. The Openchange Provision runs without error. BUT after the openchange Schema extending the replication to DC one is not working anymore. This error appears Failed to convert object CN=ms-Exch-Container,CN=Schema,CN=Configuration,DC=mo,DC=test: WERR_GENERAL_FAILURE Same as described here http://thr3ads.net/samba/2013/06/2649971-Replication-problems Every advice for a solution would be nice! Regards Masi