You may notice some new messages in Outlook, other email applications, and OneDrive that come from the implementation of Office 365 Advanced Threat Protection (ATP).
· Tooltips that indicate additional attention should be given to the sender of emails
· Changes to the displayed message from the mouse-over of links in Outlook emails
· A message indicating the Advanced Threat Protection scanning is still underway within the first minute or two of a message arriving
· An Office 365 web page giving a warning about potentially malicious links after clicking the link in an email
· A warning icon in OneDrive when a file is found with links identified as having malicious intent