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: 90.195.200.12.

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: 90.195.200.148
• Subnet: 255.255.255.235
• Gateway: 90.195.200.145
• DNS: 90.195.200.12 | 190.160.230.14

My public domain - exampledomain.com

• A record: mail - IP: 90.195.200.148
• MX record IP: 90.195.200.148

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?