Be careful installing this update on Exchange Servers per Microsoft Recommendations
https://redmondmag.com/articles/2017/06/13/avoid-net-framework-4-7.aspx
There are some also Current Known Issues Listed here
https://support.microsoft.com/en-us/help/4015088/known-issues-in-the-net-framework-4-7
Careful installing this manually or approving this via WSUS!