05 Interoperability
Server
Cluster Replicator and the Public Directory Profile
If you run a R4.63a, or lower, server in the same domain as an R5 server and there is a cluster in the domain, the Cluster Replicator removes entries in the Public Directory Profile. To prevent this, the following enhancement was added to R4.6.3b:
SPR# SALR3Y8NZH - Fix a problem with profile documents not being replicated via the cluster replicator.
R4.6.3b will be a required minimum for cluster replication with R5 Domino servers.