I need help clearing up DNS confusion for 2003/2010 coexistence.
My setup:
2003 Front-end server, 2003 Back-end server, and will be adding two Exchange 2010 multi-role CAS servers in an array (I will be performing NAT back to CAS array from my firewall)
Current external DNS:
exchange.company.com (Public IP pointing 1.1.1.1 to 2003 FE server for OWA and ActiveSync)
New external DNS:
legacy.company.com (Public IP pointing 1.1.1.1 to 2003 FE server)
exchange.company.com (new Public IP 2.2.2.2 pointing to CAS array)
autodiscover.company.com (new Public IP ? pointing to CAS array)
Question: Can I use the same Public IP 2.2.2.2 for autodiscover.company.com and exchange.company.com or will I need two separate Public IP addresses for the CAS array?