If required, specific rules can be copied between mappings, using PowerShell.
The PowerShell command is Copy-ASJECreationRules
Copy-ASJECreationRules [-Core] [-TargetContainerMappingIds] [[-SourceContainerMappingId] ] [[-SourceJournalExplosionUserQueueIds] ] [[-SourceJournalExplosionEmailRuleIds] ] [[-ReplaceExistingRules] ] []
For example:
Copy-ASJECreationRules -TargetContainerMappingIds 2,3? -SourceContainerMappingId 1
Copies all Auto-creation rules from specified source JE mapping into specified JC mappings (original rules in target mappings will be kept).
Copy-ASJECreationRules -SourceContainerMappingId 1 -TargetContainerMappingIds 2,3 -ReplaceExistingRules
Copies all auto-creation rules from specified source JE mapping into specified mappings (original rules in target mappings will be removed).
Copy-ASJECreationRules -SourceJournalExplosionEmailRuleIds 119,120,121 -SourceJournalExplosionUserQueueIds 351,352,353 -TargetContainerMappingIds 2,3 -ReplaceExistingRules
Copies specified email address and AD user rules into specified JE mappings.