In Place Upgrade 2012R2 to 2016

[karan_jhr]

Hi

I have Server 20102R2 with AD+DNS+DHCP on 1 Domain Controller.

 

Is it safe to proceed with in-place upgrade to Server 2016?

Will it take care of upgrading all 3 seemlessly?

 

thanks

[3s-gtech]

Safe to do: yes. Better to go to 2019 if licensing allows.

[karan_jhr]

thanks

i tried 2019 but its saying?

Active Directory on this domain controller does not contain Windows Server 2019 ADPREP /FORESTPREP updates. See https://go.microsoft.com/fwlink/?LinkId=113955.

 

what do you suggest?

[howartp]

We did 2008 R2 to 2016 (via 2012) at half term.

 

If you google your error, you'll find you need to run some adprep commands manually first.

 

Peter

[3s-gtech]

thanks

i tried 2019 but its saying?

Active Directory on this domain controller does not contain Windows Server 2019 ADPREP /FORESTPREP updates. See https://go.microsoft.com/fwlink/?LinkId=113955.

 

what do you suggest?

 

Ooh, been years since I’ve seen those! You just need to run adprep and forestprep from the 2019 installer.

 

https://robertsmit.wordpress.com/2018/10/04/upgrading-windows-server-2016-domain-controller-to-windows-server-2019-windows2019-ws2019/

 

You’ll need to make sure that you’re using DFS-R for sysvol replication instead of FRS too, first.

[karan_jhr]

thanks

i used

adprep.exe /forestprep /forest domainname

ADPrep /domainprep /domain domainname

 

and it upgraded the AD

 

now on secondary AD2, shall i run these again?

[3s-gtech]

If it’s on the same domain and forest, shouldn’t be any need to.