Hi Gavin, Thanks for responding. At the moment we have 3 back-end OpenLDAP servers V2.4 in Multi-Master mode with N-Way Multi-Provider replication. We have then fronted these with 3 front-end OpenLDAP servers using a BACK-LDAP proxy to direct the traffic to one node, which changes the configuration to be a Mirror-Mode configuration. As we have 3 proxies for HA there are concerns that if the proxies come out of line writes would be going to multiple backends and remove the advantages of using this mode. Wayne