RoutingAgent.OnResolvedMessage event
The OnResolvedMessage event occurs after all the recipients of the message have been resolved and before routing is determined.
Namespace: Microsoft.Exchange.Data.Transport.Routing
Assembly: Microsoft.Exchange.Data.Transport (in Microsoft.Exchange.Data.Transport.dll)
In the OnResolvedMessage event, you can override the default routing behavior by using the SetRoutingOverride method to set the per-recipient RoutingOverride property.
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