SharePoint 2016, Outlook 2016, SharePoint 2010 workflow
I have a custom SharePoint 2010 workflow in a recently-upgraded SP 2016 farm. This is a common workflow used by many people in the company. However, one user has an issue where he cannot approve workflows from Outlook and gets an error message like
This document resides in a library that is not trusted.
I've looked into this and the answer tends to be "put the site in your trusted sites" but he has no problem visiting the site. I have noticed he has severe issues with IE. Could this be the problem - that his Outlook is trying to connect to IE in order to open the task?