A colleague of mine on Office Version 2106 (Build 14131.20278) can only install COM-Add-Ins. Windows 10 Pro.
I cannot seem to find a way to allow for add-ins being installed off of XML manifest files (https://docs.microsoft.com/en-us/office/dev/add-ins/quickstarts/outlook-quickstart?tabs=yeomangenerator)
We developed an add-in using the docs mentioned above. Some can install it, others can't.
Are there any settings in Outlook that allows my colleague to actually install an add-in off of XML files?

