slapo-memberof and Replication

Hello,

I need the memberof Attribute on users, and I configured it with the memberof overlay. Every thing ist working fine. I like to deploy a second server for redundancy reason., but the manual page of the overlay says: " .. Replica servers should be configured with their own instances of the memberOf overlay if it is desired to maintain these memberOf attributes on the replicas. Note that slapo-memberOf is not compatible with syncrepl based replication, and should not be used in a replicated environment. ..."

That confuses me a little bit. All replication on openLDAP are based on syncreplication (slurpd is vanished a long time ago) So what kind of replication means the manual page (-> "Replica servers")?

Thanks Meike