I am planning to upgrade our Orion from 2018.2 HF3 to the latest 2020.2 but one of my concern is the OS, I am currently using Windows Server 2012 R2 which is the minimum requirement.

Previously we have tried to do the upgrade but we got a warning stating that we need to do an upgrade on the OS but currently, when I ran the installer, there were none stated on the OS. I think probably Solarwinds has downgraded the requirements on the OS but does anyone had the experience of installing Solarwinds 2020.2 on a Windows Server 2012 R2? Any issue faced?
I am not able to upgrade to the Windows Server 2016 or later due to 'compliance' issue, so basically I am stuck with Windows Server 2012 R2. Logged a case to Solarwinds Support and it says 'recommended' but on their website, it was stated as allowed, so it is a bit of confusing here. Thanks in advance for the help.