Hi,
I have 1 AD forest, 1 AD domain and 3 AD sites with each containing Exchange 2013 CU2 servers (2 x Client Access in HA setup, 3 x Mailbox Servers in cross-site DAG mode).
This is a fresh install with mailboxes moved in from old Exchange 2010 cluster (cross-forest remote move).
I'm having hard time tracking down why our e-mails get stuck on our internet-facing site. Mail flow is not working in between any of our AD sites. TLS has been disabled via dedicated receive connectors since we were getting TLS negotiation failures cross sites (X-ANONYMOUSTLS works within site but not across our VPN tunnels).
Intra-org protocol logging reveals no errors. Mail queues last error field is empty. Nothing gets logged on server event logs.
I'm getting desperate after banging my head to the wall for three days :)