Outlook 365 add-in only appears in Outlook 2013 client
问题 I have a problem to show my add-in in Outlook 2016. I developed it as a Office365 Add-in and it works like a charm in Outlook 2013. But at the time I wanted to test it in Outlook 2016 it does not show up in the 'Apps for Office' section. I think I have to add something to the manifest.xml, but I don't know what. In Outlook 2013 it opens a task pane in the right corner. It would be nice if it would be the same in Outlook 2016. My Outlook 2013/2016 Add-in .XML looks like this: <?xml version="1