How to drag and drop documents from Workdrive to Outlook

How to drag and drop documents from Workdrive to Outlook

Does anyone have an idea on how to drag and drop a document stored in workdrive into an email as an attachment in outlook? Similar to how it is possible to drag and drop documents from File Explorer stored documents straight into outlook as a static attachment. 
Currently my sales staff download the documents and then attach them into the email which is cumbersome and creates document control issues. Does anyone have experience in dealing with this and solutions for it?