Recently, it occured that out SharePoint Server Farm would have to undergo OS Upgrade, specifically from 2012 to 2012 r2. Searching through the internet, it made it clear that in-place upgrades are off the question, and that the best way of action in such circumstances would be, the introduction of an 2012 R2 Application Server and migration of Services and Web-Application to the new Server.
Unfortunately, i cannot find any material on such migration tasks. I do not wish to restore the Farm on another Farm. Can't i simply, introduce an App server to the farm, switch everything over to it and afterwards remove the old server from the farm?
Thanks in advance for your time and any help would be much appreciated!