Forum Discussion
EDGE 2019 Server - Unable to relay recipient in non-accepted domain
we are in the middle of a side by side upgrade of our on-prem Exchange servers from 2016 to 2019. The mailbox server and the hybrid server have both been successful with their 2016 counterparts ready...
thank you for your time and consideration, i have run nslookup set q=MX and checked arccorp.com on both EDGE 2016 and the EDGE 2019 system with identical results. i have also run on both systems resolve-dnsname -name arccorp.com -type MX and both come back with on-prem domain controllers that they both can tracert to if necessary.
If there is a firewall between the Edge server and the DNS servers, ensure that the necessary DNS traffic (UDP/53) is allowed.