I have two offices setup with the same IP Range/Subnet: Office A (XYZ.Ohio) 192.168.1.0/24, and Office B (XYZ.com) 192.168.1.0/24 - both have Server 2003 DC running AD. Office A has a SQL 2005 and SQL 2008 servers, and Office B is running an Exchange 2003 server.
I want to setup a VPN between Office A and B so I know I have to change the subnet on one, but since they are both using the most common range I'm thinking of changing both to an uncommon subnet since VPNing into either has caused issues for remotes.
My questions: 1. how involved is it to change the IP addresses/subnet on an AD network, running exchange and SQL servers, both DCs running DHCP server.
2. - what would be an uncommon and suggested subnet/IP ranges to use so we dont' confilict when Remotes VPN in to either office or conflict between offices.