Active Directory InPlace Upgrade from Windows Server 2012 R2 to 2016 Step by step

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Active Directory (DC) InPlace Upgrade from Windows Server 2012 R2 to 2016 Step by step

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Vikas Singh
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[Nckslater]

Seriously man I can't thank you enough. I was in a bit of a pickle on the 1st of October still running 2012 R2 on a AD DS Domain Controller. Followed your video instructions and it all worked thanks to your clear tutorial. Thanks again

[Chezzar]

Thank you so much Vakas. I appreciate you.

[ssharpeyes]

Thank you Vakas ... very much needed this video thanks again bro ...

[AlexNme]

Is this process still the case? Or has this changed over time with new cumulative updates?

[vermadigvijay]

Please tell me the news of mcse end in June and what is role based job

[thkossen]

is it a requirement to change the FSMO roles to another server before upgrading

[Alessandro-gvbk]

Thanks Vakas for that guide! Just for info... I need to upgrade AD from 2012R2 to 2019; I think that this guide would be fine, right? Another thing... We need to leave the domain functional level to "Windows Server 2008 R2"... Am I sure that when I run adprep /forestprep and adprep /domainprep it WON'T change that level? I have not seen in the video the upgrade of the domain functional level to Windows 2016...

[jayvs]

Thanks for the great video, i had one issue while upgrading which is "keep personal files and apps" option is greyed out for me.

[pawandeep]

Thank you for the explanation.
Powershell cmdlet can be sued for roles transfer

[AlexNme]

What if you only have one domain controller? Can you not just upgrade to 2016 from disc?

[khaledsoliman]

kindly can you make upgrade on-place from domain controller 2012 R2 to 2019

[Bond-sbhf]

You do not need to prep the domain if upgrading from 2012 or above

[charliewill]

what if i do 3 domain controllers this way 1st one is DC01 2nd DC02 3rd DC03, i did the steps as you suggested works great but now i am getting errors schema mismatch now. any suggestions?

PS C:\WINDOWS\system32> repadmin /replsummary
Replication Summary Start Time: 2023-09-04 22:00:21

Beginning data collection for replication summary, this may take awhile:



Source DSA largest delta fails/total %% error
BAFLDC01 03m:16s 0 / 5 0
BAFLDC02 01d.07h:59m:34s 5 / 10 50 (2148074274) The target principal name is incorrect
BAORDC01 01d.07h:51m:23s 4 / 5 80 (8418) The replication operation failed because of
between the servers involved.


Destination DSA largest delta fails/total %% error
BAFLDC01 01d.07h:51m:23s 4 / 10 40 (8418) The replication operation failed because of
between the servers involved.
BAFLDC02 03m:16s 0 / 5 0
BAORDC01 01d.07h:59m:34s 5 / 5 100 (2148074274) The target principal name is incorrect