Users of Outlook on the Web are blocked from downloading attachments if they have certain extensions in order to protect them from malicious scripts and executables.

Outlook Web App, also known as Outlook on the web, allows you to access your Outlook email account from a web browser.

Microsoft’s Office apps are getting more useful Copilot AI features Copilot can now help organize your Outlook inbox, perform advanced analytics in Excel, and build better PowerPoint decks.