New Outlook Offline Mode: Add and open attachments while offline (opens in new tab)

Microsoft has been rolling out offline functionality in phases, and the latest update now allows users to add and open attachments while offline. I created a short walkthrough covering what works offline now, what users need to know about attaching files from OneDrive versus local drives, and which features still require an internet connection. I also shared my discoveries when creating a calendar event that you don't want to miss. Video: traccreations4e-p26 6/15/2026