In a mixed-version Replication Server environment, the following apply:
A replication definition created with unichar or univarchar columns is not propagated to Replication Server version 12.1 or earlier.
A replication definition subscribed by Replication Server version 12.1 or earlier cannot be altered to add unichar or univarchar columns.
A replication definition altered to add unichar or univarchar columns is dropped from Replication Server version 12.1 or earlier. The oldest replication definition compatible with Replication Server version 12.1 or earlier is propagated to Replication Server version 12.1 or earlier.
A replication definition created with unichar or univarchar columns is propagated to Replication Server version 12.1 or earlier if the unichar or univarchar columns are removed.
