I am currently in co-existence (exchange 2003 and exchange 2010). i have 2 domains with separate IP addresses. xyz.com is on 184.108.40.206 and zzz.com is on 220.127.116.11.
I want to get rid of exchange 2003 but before this is done i need to solve the issues
all my mailboxes, public folders and OAB are on exchange 2010. xyz.com is working well. zzz.com is having issues. I wanted to test by shutting down the exchange 2003, which i did and i found out the zzz.com stops working when exchange 2003 is down. dns settings point to old exchange 2003. what are some of the things i have to change so that i can get zzz.com to work on exchange 2010. outgoing emails on zzz.com is working fine. It is only incoming emails that are not working. i am using barracuda firewall and spam filter.
Looking forward for feedback. Thanking in advance