Open Safe Attachments for Office 365
Unsafe Attachments are simple to spot with Microsoft Defender for Office 365. This powerful tool provides an extra layer of protection for email attachments that are scanned. The native anti-malware protection in Exchange Online Protection (EOP) keeps attachments safe. This is done by using a virtual environment to check attachments in email messages before the emails are delivered to recipients (a process known as detonation). If something harmful is in the attachment it will be contained in the virtual environment.
The tool will first check if that destination domain is on either Microsoft's Block List, (or a custom Block List created by the organization). If the URL leads to an attachment, the attachment will be scanned by Microsoft for malware. If the URL is marked as insecure, the user is taken to a page displaying a warning message asking them if they wish to continue to the unsafe destination.
Safe Attachments protection for email messages are controlled by Safe Attachments policies. There is no default Safe Attachments policy, so to get the protection of Safe Attachments, you will need to create one or more custom 'Safe Attachments policies' with the help of your IT partner, contact us here.