This topic applies to ArcEditor and ArcInfo only.
Applying schema changes in replicas involves several steps. First, you need to compare the replica schemas to find differences. This process produces a replica schema changes file. This file can then be imported to apply the changes.
In a disconnected environment, before you can compare replica schemas, you first need to export the schema to a file, then send it to the relative replica for comparison and import. See Exporting a replica schema to learn how to do this.