>I noticed that on the new server (Server 2008 r2) that customer built there is not .NET 4.5 installed (surprising to me since I have almost always see it there). So I need to install it. Since it is a customer server, I want to be extra cautious. I found this link for the download:
>
>https://www.microsoft.com/en-us/download/details.aspx?id=30653
>
>Do you think this is the right link?

4.5 came after Windows Server 2008. So, it would make sense.

If you saw it there elsewhere, it is simply because routine installation applied and it was installed.

The link you posted seems to be legit.