How can I make a backup computer/machine for AD that would continue to work in the event that the server or the physical machine with AD crashes/stops

[Monty95]

Where I work, unfortunately, we have problems with electricity and lightning in the area. Although there are voltage regulators, UPSs, it happened that when there was a big storm, lightning struck the area and damaged the components of a computer, printer, or completely fried it. It is a rare thing, but it is still possible. How could I make a backup, that is, literally a physical working copy of the existing AD, which would continue to work in the event that the physical server on which the AD is installed crashes or stops working? So I'm looking for redundancy. Any help, tutorial, material o

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