Restoring Active Directory can be tricky because there are several rules that must be observed.
Even though domain controllers are supposed to provide redundancy to each other, there are platform-specific differences that prevent data from one server from being used to restore another. You can always use a system state or critical volumes backup to restore a domain controller on which the backup was created. If you create Backup A on Server A, you can use Backup A to restore Server A at any time.
However, you cannot use a system state or critical volumes backup to restore a different domain controller or restore that domain controller to different hardware. You can't use Backup A to restore the Active Directory environment that existed on Server B; you can't "fix" a problem on Server B with Server A's backup. Similarly, you can't restore Backup A to Server B and expect it to work as Server A.
If you must restore an Active Directory backup to a different hardware platform, use a full server backup. For example, if Backup A is a full server backup -- not a system state or critical volumes backup -- you can restore Server A on another server -- effectively making that new hardware Server A.
Why do Active Directory functional levels matter?
Dig Deeper on Windows systems and network management
Related Q&A from Stephen J. Bigelow
Containers have rapidly come into focus as a popular option for deploying applications, but they have limitations and are fundamentally different ... Continue Reading
Senior technology editor Stephen Bigelow breaks down how AWS Storage Gateway can trip up users' hybrid cloud strategies. Beware these issues with ... Continue Reading
There is a small list of enterprise-class deployments and integrations known to run on VMware Cloud on AWS, but not all complex workloads are suited ... Continue Reading
Have a question for an expert?
Please add a title for your question
Get answers from a TechTarget expert on whatever's puzzling you.