Onedrive verification code not received

Hi SPConrad,

I apologize for all the trouble it has caused and sorry about your time.

As per your description, “A colleague set up shared drive using OneDrive “could you please let me know did you trying to share the folder to external users in OneDrive for business?

If yes, I tested with a Gmail account. It can receive the invitation and verification code mails without problems. You could reshare other items to external users. Check if they can receive the invitation and verification code emails.

If when sending verification code to the external users. According to my latest test, the external user will receive the verification code from the sender: no-reply@sharepointonline.com. 

Please also check the email with the verification code lands in Spam folder and check Junk Email to see if you have missed the verification code.

I appreciate your patience and understanding.

Best Regards

Waqas Muhammad