Hi @sco gordo ,
Something here might help:
https://learn.microsoft.com/en-us/lifecycle/faq/dotnet-framework
The .NET Framework is also middleware in other Microsoft products such as Exchange Server, SQL Server, Dynamics CRM, SharePoint, and Lync. Do I need to make any updates to these products if they are using .NET 4, 4.5, or 4.5.1?
Newer versions of products such as Exchange, SQL Server, Dynamics CRM, SharePoint, and Lync are based on the .NET Framework 4 or .NET Framework 4.5. The .NET Framework 4.5.2 and later versions are compatible, in-place updates on top of the .NET Framework 4, 4.5, and 4.5.1. This means that an application, such as Exchange, built using the .NET Framework 4 or 4.5 will continue to run without any changes when the .NET runtime is updated from .NET Framework 4, 4.5, or 4.5.1 to later versions. That said we recommend customers validate their deployments by updating the .NET runtime to .NET 4.5.2 or later in a pre-production environment first before rolling out a newer version in the production environment.
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Best regards,
Leon