Hi @DM Kosala Randika Paranathala ,
SCOM 2019 requires the .NET Framework 4 version, but I can confirm that SCOM 2019 works fine on .NET Framework 4.7.
Also .NET Framework is backward compatible:
Version compatibility
https://learn.microsoft.com/en-us/dotnet/framework/migration-guide/version-compatibility
Application compatibility in the .NET Framework
https://learn.microsoft.com/en-us/dotnet/framework/migration-guide/application-compatibility
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Best regards,
Leon