Please consider adding new functionality to the Zoho WorkDrive - Outlook extension. This functionality would add a button that would convert any existing files attached to the email to links. We are currently using ShareFile for this tasks.

The links but not the files are then sent over email. The files can require login or not.

What it looks like:

Email with nothing done: 

Email after clicking on the ShareFile button: 

What the ShareFile button looks like (I clicked on "Convert Attachments" to remove the file and add the links)