Microsoft is adding a new malware Zero-hour Auto Purge (ZAP) toggle to the Office 365 Security & Compliance Center. The feature is designed to detect and remove phishing, spam, or malicious email messages that for one reason or another have already landed in an Office 365 user’s inbox. Microsoft is also rolling out the new ‘Unverified Sender’ feature designed to make it easier for users to identify potential phishing or spam emails delivered to their Outlook clients’ inboxes. The new feature is currently rolling out to all Office 365 environments and it will be released in November.
Source: https://www.bleepingcomputer.com/news/security/office-365-adds-malware-zap-toggle-to-security-and-compliance-center/

