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You can send a OneDrive for Business file as an attachment in directly from an email message with the Share from OneDrive feature. This is a good way to send large sized files. Great way to avoid sharing files that are too large, take too long to upload. You will save space in mailboxes. Also, this makes collaboration easy ad it can limit having multiple versions of the file. 

Instructions:

1. Be sure that the file you want to share is uploaded to OneDrive. You do this by dragging and dropping the file from your computer.
2. From your email, click Insert and then select Share from OneDrive Attach File.
3. File the file you want to share.
4. Click Open. 
5. Choose Share link or Attach as copy:
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6. Finish the email and send it as you normally would.
7. The recipient will receive the files and have the option to view or download. 

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1. as you selected.