Unable to send email to a public folder

I have two Exchange servers that are set up with DAG. They work fine with the regular user mailboxes. But I have problems with public folders. Due to some replication problems we have chosen to have public folders on one Exchange server (SRV MAIL01), but now I get some errors when sending to some of the mail enablede public folders. # 554 5.2.0 STOREDRV.Deliver.Exception: ObjectNotFoundException.MapiExceptionNotFound; Failed to process message due to a permanent exception with message Could not open folder I can see that the error comes from the other Exchange server (SRV MAIL02) which has no public folders. I could not find a solution, is there anyone who can help.