Windows 2019 ADPrep and DomainPrep

Coopie 101 Reputation points
2020-09-24T13:26:18.213+00:00

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

Active Directory
Active Directory
A set of directory-based technologies included in Windows Server.
3,662 questions
Windows Server 2019
Windows Server 2019
A Microsoft server operating system that supports enterprise-level management, data storage, applications, and communications.
2,211 questions
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Accepted answer
  1. Dave Patrick 330.9K Reputation points
    2020-09-24T17:00:55.123+00:00

    Yes, to both. You're welcome.

    --please don't forget to Accept as answer if the reply is helpful--

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  1. Dave Patrick 330.9K Reputation points
    2020-09-24T13:38:36.877+00:00

    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.

    --please don't forget to Accept as answer if the reply is helpful--