Hi Experts, i am in the process of upgrading our estate to 2008 r2. I have two DC's on 2003 sever and plan on installing 2008 dc's and will then migrate all the roles before eventually removing the 2003 servers.
So far i have the first 2008 DC, installed and have AD & DNS working and replication all seems to be up and running but as soon as this has happenend i am starting to get issues with one of my 2003 DNS servers especially when be access from a remote office.
The users in the remote office point to my main DC (still on 2003) and this is also the Prmiary DNS server. For some reason we now cannot ping it remotley and locally we are seeing some issues with GFI not being able to use this DNS server for domain lookups.
When i perfom a Simple & Recursive test on my 2003 DNS server the recursive is now Intermittently Failing...