I have two exchange server 2010 in cluster 2008r2. Hub, Mailbox & CAS roles install in both exchange server. My EX1 working fine but i switch my mail flow to another EX2 then my incoming & outgoing mail not able to sending. & no delivery failed message received.
but my OWA open out side the office & able check email. but i try to send email then it save in draft automatically.
I check all replication & health passed.
all services of exchange server is running.
no failed delivery message receive in both side.
If i shutdown my EX1 server then no queue show in exchange EX2.