Exchange 2003 - 2010 Migration Problem
I am having a slight problem with my exchange migration. I believe I have done everything in the instructions, I have been sat in happy co-existant mode for a few months now with everything working fine.
I decided that I now want to no longer co-exist and move fully over to 2010. Our set up is as follows:
External MX Record runs through to our Barracuda spam filter which in turns is set to deliver mail to the 2010 server.
If I switch off the 2003 server I can send email internally and can also send mail out to external contacts but I can not seem to get incoming external mail to the outlook client. It hits the barracuda and shows delivered.
If I switch on the 2003 server mail flows inwards again.
Anyone point me in the right direction please?