Thanks for the info. I patched all client machines last night.

Here is the offline installer:

https://support.microsoft.com/en-us/help/3125574/convenience...

Prerequisites: must have installed SP1, along with the April 2015 convenience rollup. Links are provided in the prerequisites section.

Here's a direct link to the catalog download for the May 2017 security rollup (this supercedes all previous monthly rollups):

http://catalog.update.microsoft.com/v7/site/Search.aspx?q=KB...

For more information on the monthly rollups and how they supersede each other, see:

https://blogs.technet.microsoft.com/windowsitpro/2016/08/15/...