what’s new in DNS on Windows 2012 server ? http://technet.microsoft.com/en-us/library/hh831667.aspx

understanding DNS ? http://technet.microsoft.com/library/cc732997(WS.10).aspx

How works DNS queries and processes/interactions/dynamic updates… : http://technet.microsoft.com/en-us/library/dd197552(v=ws.10).aspx

How to access DNS application partition (AD-integrated-DNS zone) with adsiedit.msc:

from adsiedit,  Connect to the partition:  Dc=domainDnszones,dc=mydom,dc=domain,dc=net

Then expand to go to mydom.domain.net

You can find all the DNS records,

Select the CN=MYCOMPUTER1 for instance, right-click properties, edit attributes

Check the attribute value “whenChanged” you have the real time when the DNS record has been modified (real timestamp !)