MID Server Windows OS In-place Upgrade

[Jeff77]

We are currently running mid servers on Server 2016, which will be fully end of life in 15 or so months, so looking to upgrade.  Plans are to upgrade to Server 2025.  My question to the community is whether anyone has experience doing in-place Windows OS Upgrade on their MID Server, and if they could offer any thoughts/feedback/recommendations (i.e. yes, it works fine....or no, you want to do a clean OS install and then re-install/re-setup the MID Server).  

Thanks in advance.  

[jonsan09]

In my past experience I preferred setting up new MIDs along the side and then transitioning over. I presented on MID servers this past knowledge conference, this slide was about MID service migrations. 

• Get your new MID server(s) running and configured
• Run old and new systems concurrently where possible
• Point existing services, and integrations to your new MID server or Cluster
• Test, test, test, and then test some more. Validate everything is working
• Sop service on hold host / Keep the record for rollback (For about 1 week)
• This is your safety net/rollback plan. If something goes wrong with your new MIDs. You can restart the old
• service and switch everything back over.
• You’ll be operational again and reduce disruption. Giving your teams time to figure out the problem.
• Remove the MID Server Record from your instance and then decommission the actual host server. (Wipe it, shut it down, Whatever your company's procedure is.)
• Minimizing risk and service disruption is the name of the game.