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: …

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 …