For several years, Microsoft has been trying to persuade users to move from the classic Outlook app for Windows 11 to the new version, which is (essentially) a repackaged web app.
The latest update offers improved offline support, making it possible to add attachments to emails without an internet connection. The emails will send automatically once you’ve got a working connection again.
According to Windows Latest, Microsoft has been testing this feature since October 2025, with a wider rollout only now beginning. Although the “new” Outlook has improved recently, many still prefer the classic app or the web version.
