In a replicated topology, schema definitions are automatically replicated to ensure that all servers use a single schema. Schema modifications on any server are replicated to all other servers in the topology.
When you configure replication, the schema of the first server is used to initialize the schema of the second server by default. You can, however, specify that the schema of the second server be used to initialize the schema of the first server. You can also specify that schema replication be disable altogether. For more information, see Configuring Schema Replication.