Here’s a bright shiny new video detailing how to share files with external users from OneDrive for Business. You’ll see how to share with external users via email address and via a direct URL. Nice and easy.
If you wish to share with external users via email (i.e. they have to actually login to view the document), then they’ll need a free Microsoft account which they may already have or can easily set up using their own email address.
If you wish to share the document without the need for a login you can also do that easily via OneDrive for Business.
Sharing your files via OneDrive for Business means that you retain the source and control of the files. It also means there is a single point of truth when it comes to the document. That alone is worth using OneDrive for Business to share personal business documents.
CIAOPS 