Hello all :)
I have a VERY strange problem that has just appeared.
We run a windows AD domain, mix of server 2008 and 2012 with DHCP.
Lately some users are losing access to the internet.
Running a nslookup command returns "server unknown"
Releasing and renewing the IP on that PC fixes that problem for several hours until it happens again.
The DNS server also runs DHCP and is a DC.
I have checked the DHCP settings and they are all correct with regards DNS IP, gateway IP etc.
What could be causing this odd behaviour?