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ntds to bring up Active Directory, as well as its dependencies.

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Now, what's the old‑school analog?

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That would be Directory Services Restore Mode.

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And what we'll need to do there is, this is just one way to do it,

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go to msconfig.

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I mean,

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I remember the days of rebooting a domain controller and then

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having a keyboard there and hammering on F8.

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I mean, ain't nobody got time for that.

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Especially when every minute of unavailability counts for these

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machines and you have service level agreements attached to

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these machines and their services, much better to be very intentional.

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So MSConfig, also known as system configuration,

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allows us to be very intentional on the boot page here and say,

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let's do a Safe boot for Active Directory repair.

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This way, we're guaranteed that upon system restart,

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we'll go into Directory Services Restore Mode.

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So let's click OK and hit Restart to start that process.

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All right, well, I'm back from the restart.

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I actually was having some problems getting into

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Directory Services Restore Mode,

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so I figured the next best thing would be to just show you.

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I mean, not that there's anything dramatic to see.

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All you have is the Advanced Boot Options going into DSRM,

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and then you're given a Command Prompt from which you can run your commands,

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just exactly like I showed you, with Restartable AD DS.

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You'll want to make sure that you come out of MSConfig

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mode and that you're restarting normally,

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just verify that your Boot is set back to regular,

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no Safe boot, just a regular, old standard startup.

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Last thing we're going to do here is look at replication.

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Specifically, let's kick the tires a bit with repadmin.

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Like I said, /?

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gives you some nice help.

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You can always do a repadmin and then pipe that to a text file.

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That'll give you a print of all that.

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But you can go online too.

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I mean, that's not that great of a recommendation.

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How about, show replsummary and see what's going on.

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Now, as I showed you at the beginning of this demo,

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let's see, total percent error, okay,

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so I've got some communications happening here.

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I've brought up MEM1, which is my second domain controller in this environment,

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about 25 minutes ago,

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so it makes sense that the delta here is that amount of prize.

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We've got some issues here, maybe a network‑level error.

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Let's take a look at some additional flags, like replsummary was good. How about showrepl?