Microsoft’s new Outlook now supports offline email attachments

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.