LENOVO szerver OS - Microsoft Windows Server 2022 Essentials (10 core) - Multilanguage ROK
Windows Server 2022 is not and will not be certified for Mehlow servers = ThinkSystem ST50, ST250, SR250.
The reason here is that “Intel does not want to support WS22 on Mehlow.” – therefore this an industry wide issue and this also affects other OEMs.
If you go to the Lenovo OS Interoperability Guide (OSIG) you will see that everything is displayed correctly - ST50, ST250, SR250 do NOT have Windows Server 2022 certification.
Windows Server 2022 support will only be in place for the upcoming Tatlow platform from Intel.
https://lenovopress.com/osig#server_families=thinksystem&servers=st250-7y45-7y46-e-2200&servers=sr250-7y51-7y52&servers=st50-7y48-7y49&os_families=microsoft-windows-server&support=all