EDIT:
If User A is connected to Openfire 1 (Client 1) and Openfire 2 (Client 2) the Message Copy is also not delivered to the other Ressources of User A
I can confirm that behavior and came to this thread to find a solution. Is this a Bug or can i possibly configure the expected behavior?
I have moved your question to a separate thread as it is not related to Message Carbons. Route all resources options are not intended to make it work as Message Carbons. This is only a workaround for some specific scenarios. If you really need proper message synchronization, then Message Carbons is the only way. But it only syncs messages when all clients are online, it won’t do it if a client is offline. More information Explanation: message synchronization between clients
When a user is logged in on two different server nodes in a cluster at the same time then it seems that message carbons don’t work. When they are on the same node then everything works fine.