Office 2016 October 2017 Update “The New Feature”

What is the newest feature that Microsoft has bestowed upon us in Oct 2017 for Office 2016?

An irritating recurring Windows Security Outlook authentication prompt that re-requests your login credentials (username and password) multiple times a day. Even though your system continues to talk to your mail system, the prompt appears insistently.  You can try to ignore it, or hide it, but eventually you’ll want this fixed.

The October public build 16.0.8431.2079 of Office will exhibit this issue.  Reverting to the September public build 16.0.8326.2107 will resolve the issue.

  • To revert the update to the September build, open an elevated Command Prompt (CMD – NOT POWERSHELL).
  • Change to your system drive, usually drive C:.
  • Type the command: cd %programfiles%\Common Files\Microsoft Shared\ClickToRun\
  • Type the command: officec2rclient.exe /update user updatetoversion=16.0.8326.2107


The system will commence to install the September build and inform you when it is ready for use, and this process could take 10-30 minutes.

Also, you will want to avoid allowing the automatic updates from reinstalling the new version until Microsoft has fixed the issue.  There is no telling when that will be at this time.

If you have any questions, contact NMJ Technology LLC at 330-283-6902.




I have been in the Information Technology Consulting business since 1987. I studied at Kent State University in the field of Industrial Technology with the desire to become an electrical engineer like my father before me. My segue into computer networking was a complete surprise that I gladly accepted as a way to move forward in my experiences. I learned networking from the Novell point of view, and that eventually led me into the Microsoft world which is where I have become an exceptional consultant. Away from business, I continue to perfect my musicianship and write music. I have a lovely wife, and darling daughter, and super step son, two cats, a dog, and some gold fish in my pond.