If your Outlook looks like the image below, you're in the light version of Outlook. This means you're using an old browser that's incompatible with the new Outlook.com and Outlook on the web or with Outlook Web App. For the best experience, please update your browser to the latest version. For information about which browsers support the new Outlook.com and Outlook on the web, see Which browsers work with Office Online . For information about which browsers support Outlook Web App, see Supported browsers for Outlook Web App . Open an attachment in its original format In the light version of Outlook, you can use Open as Web Page or Open in browser to convert and open several common types of attachments as web pages. To open an attachment in its original format, click the link at the top of the web version of the attachments. Save an attachment you've op...