Microsoft Defender for Office 365

Phishing is an email attack that aims to steal sensitive information through messages that appear to be from legitimate or trusted senders. You can enhance the security of your Exchange Online mailboxes by implementing anti-phishing policies. What you can manage with Anti-phishing policies Anti-phishing policies provide enhanced control over incoming phishing emails, for instance, in cases where someone may attempt to impersonate your CEO or send messages from a domain that closely resembles yours. By default, a policy named ‘Office365 AntiPhish Default (Default)’ is automatically applied to all users. ...

All inbound e-mail is automatically protected from spam by Exchange Online Protection (EOP) for Microsoft 365 organizations with mailboxes in Exchange Online. EOP uses anti-spam policies as part of your organization’s overall spam defense. What you can manage with Anti-spam policies Anti-spam policies provide you with control over both inbound and outbound email in Exchange Online. Within the Microsoft Security Portal, you can access the Anti-Spam Policy section, where three default policies are available for editing. Additionally, it is possible to create custom policies, and further details on this will be discussed later in this post. ...

Quarantine policies let you control the quarantine on how users can use it. This post will cover the default policies and how to create a custom policy. What are quarantine policies Back in April 2020, Microsoft made it possible for users to view, release, or delete quarantined messages (expect high confidence phishing). Some organizations were not happy about users having access to their own quarantined items. Quarantine policies give you more control over quarantine for your end users and which quarantined items they can release. ...