I have successfully moved all user mailboxes to Exchange 2010 and all mail services are working correctly, with one small exception. I was able to successfully decommission one Exchange 2007 server, but the last one is giving me trouble. The last item keeping me from removing the server is public folder replication errors.
I ran the moveallreplicas script on the Exchange 2007 server. It ran without errors. I tried removing the public folder database a couple of days later, but received the public folder database still contains replicas error. I ran the get-publicfolderstatistics command on the Exchange 2007 server and I can see data left in only a couple of folders. I checked the queues on the Exchange 2007 server and they are empty. However, on the Exchange 2010 servers, I see messages stuck in the hub version 8 queue. The error message is 451 4.4.0 target ip address responded with 421 4.2.1 unable to connect. I have verified all server can ping each other by netbios and FQDN. Anyone have any ideas on how to solve the hub version 8 problem? I assume when this problem is cleared, public folder replication will complete and I can uninstall 2007.
Thanks for your help.