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  • Hanna Korotka

How to Protect Against Phishing in Microsoft 365?

Phishing attacks have become increasingly sophisticated, targeting both individuals and organizations. With the widespread use of Microsoft 365 (formerly known as Office 365), it's crucial to fortify your defenses against these deceptive tactics within this popular platform. In this blog post, we'll explore how to protect against phishing threats in Microsoft 365 using the latest security features and best practices recommended by Microsoft.

Before diving into the protective measures, it's essential to understand the evolving phishing threat landscape. Cybercriminals use social engineering techniques to trick users into divulging sensitive information, such as usernames, passwords, and financial data. Phishing attacks can take the form of malicious emails, links, or attachments, and they often masquerade as trusted entities.

1. Enable Multi-Factor Authentication (MFA)

One of the most effective ways to thwart phishing attacks is by enabling Multi-Factor Authentication (MFA) for your Microsoft 365 accounts. This adds an extra layer of security, requiring users to provide a secondary form of verification in addition to their passwords. MFA significantly reduces the risk of unauthorized access, even if a user's password is compromised.

2. Implement Defender for Office 365

Microsoft Defender for Office 365 is a suite of security tools that helps protect against phishing and other advanced threats. Microsoft Defender for Office 365 includes features like Safe Links, which checks the safety of URLs in emails before users click on them, and Safe Attachments, which examines email attachments for malicious content before delivery. These tools provide a crucial defense against malicious links and attachments.

3. Use Anti-Phishing Policies

Leverage anti-phishing policies in Microsoft 365 to identify and block phishing emails automatically. Configure these policies to automatically move suspicious emails to quarantine or apply other actions to prevent users from interacting with malicious content. Regularly review and adjust these policies to stay ahead of evolving threats.

4. Educate Users

Human error is a significant factor in successful phishing attacks. Regularly educate your users on how to recognize phishing attempts, emphasizing the importance of not clicking on suspicious links or downloading attachments from unknown sources. Conduct ongoing training and phishing awareness programs to keep your users vigilant.

5. Set Up Email Spoofing Protection

Enable email spoofing protection to prevent attackers from using forged email addresses that appear legitimate. Microsoft 365 has features like DMARC, DKIM, and SPF to help detect and block spoofed emails. Configuring these settings correctly adds an essential layer of defense against email spoofing.

6. Monitor User Behavior

Implement user behavior analytics to detect unusual activity within your Microsoft 365 environment. Unusual login patterns or email forwarding rules can be indicators of a compromised account. By monitoring user behavior, you can identify potential security threats early and take action to mitigate them.

7. Conduct Phishing Simulations

Regularly conduct phishing simulations within your organization to test the vigilance of your employees. This helps identify individuals who may need additional training and reinforces the importance of cybersecurity awareness. Simulated phishing attacks provide a safe environment for users to learn how to spot phishing attempts.

8. Keep Software Updated

Ensure that all Microsoft 365 components are up to date with the latest security patches and updates. Cybercriminals often target vulnerabilities in outdated software. Staying current with updates is a fundamental part of maintaining a secure Microsoft 365 environment.

9. Utilize Microsoft Secure Score

Microsoft provides a Secure Score tool that assesses your organization's security posture within Microsoft 365. It offers recommendations for improving security and provides a numerical score to track your progress. Regularly review your organization's Secure Score and implement the suggested improvements to enhance your overall security.


Protecting against phishing in Microsoft 365 requires a multi-layered approach that combines robust security features, user education, and proactive monitoring. By implementing the recommended measures outlined above and staying vigilant, you can significantly reduce the risk of falling victim to phishing attacks within the Microsoft 365 environment. Remember, cybersecurity is an ongoing process, and continuous improvement is key to staying ahead of evolving threats.

To help you to have peace of mind knowing your business is secure, click here to schedule a Microsoft 365 Secure Score review with our experts today. We'll evaluate your current cybersecurity measures, identify potential vulnerabilities, and help you implement a strategic security plan to keep your company safe.

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