Forum Discussion
Upgrading a Server 2012 R2 to 2025
I've tested it and it works. Make sure your server 2012 R2 has windows updates installed. In my test envronment, a fresh install of 2012 R2 failed early on in the windows server setup.exe process. Type 1 and Type 2 VM's both tested working. You absolutely can in place upgrade 2012 R2 to 2025. It works in Hyper-V and I would assume bare metal. Microsoft states that you can and it's true. That's the only part of the equation I can confirm for you.
For some reason my reply is lost. I'm still stuck here sadly. I'm on Hyper-V, licensed active Server 2012 R2, MSSQL Server 2012 Developer Edition, AD/DNS but when I use the installer I cannot select the option to keep the previous install.
Regards,
Justus
Hi, this is likely due to the ISO you are using, if you use the Evaluation version you download from MS site directly this will only allow a reset install of 2025.
You must obtain a retail or VLK edition of the ISO for an in-place upgrade (or when its available again, it will be released as an optional windows update)
So, I'm sadly still stuck here. I have the whole thing running on Hyper-V on an up to date Windows 11 Host. The base operating system Server 2012 R2 has been updated to the latest patches including all optional patches.
The licensing status of the Server 2012 R2 is "activated". Is there anything else that might pertain to the issue?
I get the normal procedure up to accepting the EULA but then it only offers me the "Save nothing" option, with the "keep data" option unselecetable.
As mentioned before there is a OneIdentity Manager installed, this is using MSSQL Server 2012 Developer Edition. Is it possible that, or the AD/DNS is preventing the upgrade?
Kind regards,
Justus
