In this Technet article, it's specified that the transport rules are stored in Active Directory. Even though it's not specified explicitly, to my knowledge this is being stored in the Configuration Partition. My question is - assuming the AD replication reaches a DC in the same site as an Exchange Mailbox server - how long does it take for the Transport service on that Mailbox server to pick-up the new rule ? Is it polling every 5 minutes, is it event-triggered, etc ?
In the same article mentioned above, it's stated that an event is written to the Security log in Event Viewer when this is being retrieved, unfortunately the ID isn't mentioned. Does anyone know what this might be ?