Sync Strategy property on the user device extension in the receiving station selects the strategy to use.

A strategy of Prototype Required replicates (synchronizes) user data from the sending station to the receiving station when each UserService has an identically-named user prototype.
The Use Default Prototype strategy replicates user data from the sending station to the receiving station using the default prototype. You would use
this strategy if a receiving station does not have a matching-named user prototype.