This simple email perceives to be an alert about a confidential document that has been shared with you. While this may look similar to a legitimate message, always verify the sender! Microsoft may be legitimate, but usually the "colleague" would be identified in the message, giving you some information on who really sent you the document. The "View Document" link is fraudulent, and contains either malicious code or a login page to steal your credentials. Thank you for the dozens of reports!
Please report any suspicious emails to firstname.lastname@example.org