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Coopie-6364 avatar image
Coopie-6364 asked ·

Windows 2019 ADPrep and DomainPrep

Hey all

I'm planning to promote a Windows 2019 DC (And another one shortly thereafter) in an isolated Forest that currently is Schema version 47 (Windows 2008R2)

There's only one other DC in this current setup, Windows 2008 R2, so there is currently no resilience.

Was hoping you could help me with some direction? Couple questions:

  • Am I right in thinking that the ADPrep tool and the files, from the Windows 2019 DVD, will have all the schema additions from 2008R2 onwards bundled in?

That is probably a silly question, but as I only have the 1 existing DC server in this isolated environment ive just inherited, I'm being extra cautious.

2. What files do I need in order to run ADPrep and DomainPrep? Do I need the entire 5GB ISO copied over or could I just copy over the ADPrep folder.....

The server is a few hundred miles away and on a fairly restricted network, so I need to plan this out.
I can probably map a drive with the files onto the server from a jump off location, but I just want to account for any issues I could have if I lost OS access. In that event I can get on via ILO but would ideally like the relevant ADPREP files to hand, no obvious reason other than having them there.

Any help appreciated folks
Coop







windows-active-directorywindows-server-2019
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DSPatrick avatar image
DSPatrick answered ·

Yes, to both. You're welcome.


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DSPatrick answered ·

Adprep has been a part of domain controller promotion for some time now so nothing extra needs to be done.

The two prerequisites to introducing the first 2019 domain controller are that domain functional level needs to be 2008 or higher and older sysvol FRS replication needs to have been migrated to DFSR
https://techcommunity.microsoft.com/t5/Storage-at-Microsoft/Streamlined-Migration-of-FRS-to-DFSR-SYSVOL/ba-p/425405


I'd use dcdiag / repadmin tools to verify health correcting all errors found before starting any operations. Then stand up the new 2019, patch it fully, license it, join existing domain, add active directory domain services, promote it also making it a GC (recommended), transfer FSMO roles over (optional), transfer pdc emulator role (optional), use dcdiag / repadmin tools to again verify health, when all is good you can decommission / demote old one.


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Thanks for the quick response DSPatrick

  1. OK great, so I can just allow the DC Promo phase on the 2019 box to update the schema and Domain, no need to separate that task out like was the case in bygone years? I wasn't sure if the current recommendations were still to run adprep separately from the promo or not.

The pre-reqs are definitely met, DFS-R is definitely the status and Dom Function is 2008 R2.

  1. As for the files.....do I actually not need the Windows 2019 DVD now..... if by installing the ADDS role on Windows 2019 I also install all the necessary ADPrep tools, then that's great.

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