***UPDATE: A fix has been released.  See https://support.microsoft.com/en-us/help/4032782/a-blank-page-or-404-error-prints-when-you-try-to-print-a-frame-in-inte ****

There is currently a known issue where users receive a "404.0 - Not Found" error when printing to Printer from the Dynamics GP 2016 Web Client:

The above will actually print, rather than the intended report, etc.

The known workaround at this time is to use a web browser other than Internet Explorer.

This issue is caused by the following Windows Updates:

KB4022726 Windows 8.1 and Server 2012 R2
KB4022725 Windows 10
KB4022719 Windows 7 and Server 2008 R2

Per https://support.microsoft.com/en-us/help/4022726/windows-8-update-kb4022726   

"Known issues in this update

When you print a specific iframe or frame in a web page, the print output may be blank, or text is printed that resembles the following:

404 – Not Found

(A frame is a part of a web page or browser window that displays content independent of its container. A frame can load content independently.)

This problem has also been observed in both Internet Explorer 11, and in applications that host the IE Web Browser Control.
 
There is currently no workaround for this issue. However, if you print the entire web page, it will print correctly.

Microsoft is researching this problem and will post more information in this article when the information becomes available. "

 

I will also update this blog post as soon as more information is available.