Just looking to make things easier for myself. I am working on phasing out our old Microsoft AD domain controllers, which were previously used to internal DNS resolution, with new ones. I've updated our DHCP to the new domain controllers, now I'm trying to weed out all the devices that have statically assigned DNS settings to manually update them.
Now that all DHCP clients should be getting DNS from the new servers, I'm wondering if there's a way (powershell?) to poll DNS activity on the old servers to generate myself a list of IP addresses that are still getting DNS from the old servers? I'm thinking this has probably come up before, but so far I haven't found anything, wondering if someone knows the answer already and can point me at it?