In this chapter, we looked at the recovery procedure in the event of a corruption or failure of the AD database on a single domain controller. This is a scenario that happens more frequently than one might expect. So, instead of "just re-installing", these options and procedures will help you get a healthy DC back in no time while limiting the amount of errors in the event log.

We also looked at some tools that will help you not only diagnose AD problems, but also allow you to perform, when used regularly, AD health tests to make sure your AD is always in perfect working order. This way, you might prevent failures because you might find the symptoms earlier.