Hi Team, Outlook Add-In is not enabled when the user has selected a mail (not yet read) while the reading pane is off. As a result, while developing any custom add-ins, we are not able to retrieve t...
You are correct, the Viva Insights button does indeed show up without the Reading pane open. It simply wasn't showing for me the first time; when I restarted Outlook to check again, it was visible. Weird. I will ask the Office extensibility team about this, as this capability is not available to non-Microsoft add-in developers, but it is clearly possible.
Regardless, pinnable task panes will indeed close when navigating to a folder with the Reading pane turned off - but it will open and remain pinned if you navigate to a folder that does have the Reading pane on.