Microsoft today announced the roll-out of one of the most requested features on Outlook Web App. Outlook Web App now lets you save attachments you’ve received in email directly to your OneDrive for Business folder. In Outlook Web App, when you click Save to OneDrive or Save all to OneDrive, your files are added to a OneDrive for Business folder called Email attachments. Once they are stored in OneDrive you can move them to another folder, or send them in email as a cloud attachment.
This allows you to access these files from wherever you are and more importantly, gives you the ability to collaborate on these files in Office or Office Online without having to manage and keep track of multiple versions.
Read more about it here.