Decommissioning an Old Domain Controller

clyde30152
clyde30152 used Ask the Experts™
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We have three domain controllers.  The original is running Windows 2008 r2.  The other two were added later and are running Windows 2019.   All three are setup with global catalog and we only have one domain.   We now want to decommission the older Windows 2008 server.   Is it as simple as deleting it via active directory or do we need to run DCPROMO on the older server?
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Commented:
kevinhsiehNetwork Engineer
Commented:
In addition, make sure that nothing is pointing to the old DC for DNS, DHCP, NTP, NPS, etc.

Be sure current PDC emulator is syncing time with an external source properly.

I agree to turn it off for a few days. If everything is good, power back on and do a proper dmpromo to demote.

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Commented:
I actually unplugged the network cable.  The next morning I had an DNS issue, so I reconnected.   I obviously have a little more work to do.
MASEE Solution Guide - Technical Dept Head
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Commented:
Did you change the DNS IP in DHCP scope?
Did you shift move FSMO roles?
DrDave242Principal Support Engineer

Commented:
Do all of your 2019 DCs have SYSVOL and NETLOGON shares, and do those shares have the expected content inside them?

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