Funny... I just wrote 2 blog articles about this last Friday.
http://www.sourceonetechnology.com/the-quirks-of-windows-server-2012-r2-in-place-upgrades-part-1/ http://www.sourceonetechnology.com/the-quirks-of-windows-server-2012-r2-in-place-upgrades-part-2/ I've done 20+ in-place upgrades from 2008 R2 to 2012 R2 (on multiple domain controllers too). Some people are adamant, "Don't do it!". I don't necessarily agree with that (but in some cases I do agree!). I think each server should be judged on a "case by case" situation as to whether an in-place upgrade, or a migration, should be done... There are a lot of pros and cons for both methods. You can save hours/days with an in-place upgrade versus a migration. However, you might lose out on some features from a fresh install, and even create more headaches -IF- the upgrades go bad. Jesse Rink Source One Technology, Inc. HP Partner 262 993 2231 ** Please visit our blog! http://www.sourceonetechnology.com/blog/ ________________________________ From: listsadmin@lists.myitforum.com <listsadmin@lists.myitforum.com> on behalf of Jonathan Raper <jra...@nwnit.com> Sent: Friday, January 8, 2016 1:26 PM To: ntsys...@lists.myitforum.com Subject: [NTSysADM] In-place upgrade of a 2008 R2 DC to 2012 R2? Happy New Year to the collective! I know this has been supported since at least 2008....and sounds like it has improved with each iteration since. However, I am old school and have *never* been a fan of any kind of in-place upgrade. Further.... The very first sentence in Microsoft's TechNet article Upgrade Domain Controllers to Windows Server 2012 R2 and Windows Server 2012<https://technet.microsoft.com/en-us/library/hh994618.aspx#BKMK_UpgradeWorkflow> , updated less than a year ago: "The recommended way to upgrade a domain is to promote domain controllers that run newer versions of Windows Server and demote older domain controllers as needed. That method is preferable to upgrading the operating system of an existing domain controller." That being said, I've got an admin (junior to me) who seems to think it is a good idea (because he wants to cut a corner). I and another peer (also a senior engineer) disagree with him. Regardless, I'm curious if anyone here has tried this and if so what your experience was? Thanks, Jonathan
