Hi there, apologies for posting but I can't seem to find the answer to this anywhere and afaik I am following all good practice!
We have several sites with DCs in all of them and at our main location we have a several servers with a couple of DCs, The problem is with the exchange server which is also a GC, if the other GC goes offline it fails to serve email as it cannot find AD! at
first I assumed it was something to do with AD so I have run DCdiag and it reports no errors on either machine (bar a few missing RD print drivers) and repadmin shows no problems either what on earth could be causing this?
I wondered if my DNS settings are correct or if exchange is just being mental? my setup is below, VPNs exist between gateways
Main Site
PDC1 (GC, DHCP, DNS) 2008r2
IP-10.0.0.1
GW-10.0.1.9
DNS-10.0.0.1
DNS-10.0.0.3
RDC (Remote Desktop, IIS) 2008r2
IP-10.0.0.2
GW-10.0.1.9
DNS-10.0.0.1
DNS-10.0.0.3
MAIL (Exchange, GC, DNS) 2008r2
IP-10.0.0.3
GW-10.0.1.9
DNS-10.0.0.3
DNS-10.0.0.1
DNS (DC, DNS) 2003r2
IP-10.0.0.50
GW-10.0.1.9
DNS-10.0.0.50
DNS-10.0.0.1
Remote site 1
DC1 (DC, DHCP, DNS) 2003r2
IP-10.0.1.1
GW-10.0.1.9
DNS-10.0.0.1
DNS-10.0.2.1
Remote Site 2
DC2 (DC, DHCP, DNS) 2003r2
IP-10.0.2.1
GW-10.0.2.9
DNS-10.0.0.1
DNS-10.0.1.1
I do hope someone has some ideas because I can't have exchange fall over everytime the PDC reboots!
