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The report can be accessed via transaction code /xalm/cc4_mass_sync and can be found in SPRO via SAP Solution Manager → Cross Connecter → SAP Solution Manager to External System → CC4 mass synchronization:
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Use Case 1: Synchonization without SCOM or PPF-Action
Use Case 2: Mass synchronization after down time
Use Case 3: Synchronization closed tickets/Mass Migration