Be on the lookout for phishing emails with a professional look and feel. These emails [featured above] both look legitimate at first glance, but the OneDrive share on the right is actually a phishing email.
Once the email is opened the URL looks good, however...the Microsoft logo has incorrect coloring, and Microsoft will never ask for a user login & password in this manner.
Once again, the URL is secure and may look safe but...Microsoft will never ask for multiple logins, and this should be a dead giveaway that this is not an official Microsoft email.