You can share Office files from the cloud by adding a link to a message.
In your message, on the Message tab, select Insert Link.
Locate the item or folder that you want to attach and click to select it.
You can choose an Office document from the drop-down list, browse cloud locations, or insert a hyperlink.
Note: The first time you attach a link to a document that's stored in the cloud, you might be prompted to add a source.