When I try to install Exchange 2010 on my server 2008 R2 server I get a warning during the prerequisites check:
Warning: setup cannot verify that the 'Host' (A) record for this computer exists within the DNS database on server: 18.104.22.168.
The goal of this Exchange setup is that I'm able to sent email in my local domain as well receive/sent email through the public domain name.
Some information about my setup This Server is going to be a dedicated exchange host and has the following IP setup: (IP's are examples and not the real IP's ofc)
Local VLAN NIC:
- IP: 10.10.50.22
- Subnet: 255.255.255.0
- No gateway
- DNS: 10.10.50.1 (is domain controler with authoritive DNS)
public WAN NIC:
- IP: 22.214.171.124
- Subnet: 255.255.255.235
- Gateway: 126.96.36.199
- DNS: 188.8.131.52 | 184.108.40.206
My public domain - exampledomain.com
- A record: mail - IP: 220.127.116.11
- MX record IP: 18.104.22.168
As I'm seeing now the exchange setup is looking for the A record in one of the DNS servers in my Public WAN NIC. And ofc this is not where my A records are defined. I have those A records in 2 places: 1. In the domain controler DNS (the private nic) 2. In the online dns registration of my public domain (exampledomain.com)
My question is... is this warning going to be a problem? Can I do something better in my setup so that this warning will go away? Please advice?
Edit: Some additional info. Today I've tested dns functionality with dcdiag and I've also used nslookup from various places to see if I could locate my mail server through IP/domain name/computername. All is fine.
Then as a test I disabled the Public WAN NIC for a sec and started the Exchange setup again. Now the set-up goes through all checks WITHOUT any issue.
Somehow this leads me to believe that this is warning I can safely ignore but still would be nice if anyone can shed some light on why Exchange set-up seams to prefer the NIC that holds the Gateway... (at least this is my careful conclusion)