Dns not updating active directory

15-Nov-2018 10:29

During domain controller installation, AD DS initially stores the VM Generation ID identifier as part of the ms DS-Generation ID attribute on the domain controller's computer object in its database (often referred to as the directory information tree, or DIT).The VM Generation ID is independently tracked by a Windows driver inside the virtual machine.The VM-Generation ID design uses a hypervisor-vendor independent mechanism to expose this identifier in the address space of the guest virtual machine, so the safe virtualization experience is consistently available of any hypervisor that supports VM-Generation ID.This identifier can be sampled by services and applications running inside the virtual machine to detect if a virtual machine has been rolled back in time.

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A virtual machine (VM) makes it easy for hypervisor administrators to roll back a domain controller's USNs (its logical clock) by, for example, applying a snapshot outside of the domain controller's awareness.

AD DS replication, for example, uses a monotonically increasing value (known as a USN or Update Sequence Number) assigned to transactions on each domain controller.