In my last post I showed how declaring a low Mailbox requirement set in the manifest got my Outlook add-in to show up on mobile. Great. Button’s there, task pane opens, everything looks alive. Then the user taps “Archive to SharePoint” and the whole feature stands on one API: …

This is the third post in what accidentally became a trilogy about getting my Outlook add-in to work on mobile. Post one made the add-in visible on the phone. Post two made it functional by falling back to a Microsoft Graph call when getAsFileAsync wasn’t there. And in that second post I wrote …

I recently built an Outlook add-in. It archives emails and attachments to SharePoint, lets you attach cloud files while composing, the works. It ran great on desktop, great in Outlook on the web. Then I opened Outlook on my phone to test it there. The add-in was gone. Not broken. Not throwing …