If you want to disable all unmanaged or installed OneNote add-ins at once, here is how you can do that. Although OneNote doesn’t offer any option by default, you can make things happen with the help ...
Get Add-ins function allows you to install and manage new add-ins in Outlook and other Office apps. However, some users have reported that the Get Add-ins feature is greyed out in their Outlook app.
Some results have been hidden because they may be inaccessible to you
Show inaccessible results