Microsoft Defender for Office 365

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Prevent threats with Microsoft Defender
The Microsoft Defender family offers comprehensive threat prevention, detection, and response capabilities for everyone—from individuals looking to protect their family to the world’s largest enterprises.
Explore products
May 6, 2021

8 min read

Business email compromise campaign targets wide range of orgs with gift card scam

Read our investigation of a BEC campaign that used attacker-created email infrastructure to facilitate gift card theft targeting the consumer goods, process manufacturing and agriculture, real estate, discrete manufacturing, and professional services sectors.
May 6, 2021

5 min read

Business email compromise: How Microsoft is combating this costly threat

Business email compromise is the costliest phishing attack threat to organizations.
March 2, 2021

7 min read

4 ways Microsoft is delivering security for all in a Zero Trust world

Today we’re excited to share with you several new innovations across four key areas—identity, security, compliance, and skilling—to give you the holistic security protection you need to meet today’s most challenging security demands.
February 1, 2021

18 min read

What tracking an attacker email infrastructure tells us about persistent cybercriminal operations

Sweeping research into massive attacker infrastructures, as well as our real-time monitoring of malware campaigns and attacker activity, directly inform Microsoft security solutions, allowing us to build or improve protections that block malware campaigns and other email threats, both current and future, as well as provide enterprises with the tools for investigating and responding to email campaigns in real-time.
Retain Microsoft Security Experts
Microsoft Security Experts are now available to strengthen your team with managed security services. Learn how to defend against threats with security experts.
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December 16, 2020

4 min read

Terranova Security Gone Phishing Tournament reveals continued weak spot in cybersecurity

See which industries had the highest click rates, as well as results sorted by organization size, previous training, and more.
October 5, 2020

3 min read

Why integrated phishing-attack training is reshaping cybersecurity—Microsoft Security

Phishing is still one of the most significant risk vectors facing enterprises today.
August 11, 2020

4 min read

Microsoft Office 365—Do you have a false sense of cloud security?

Security is not just flipping the switch of security features to “on” and think you are done.
March 26, 2020

3 min read

Alternative ways for security professionals and IT to achieve modern security controls in today’s unique remote work scenarios

Increased remote work has many organizations rethinking network and security strategies.
Modernize your Security Operations Center with Microsoft Sentinel
Microsoft Sentinel is a cloud-native SIEM solution powered by AI and automation that delivers intelligent security analytics across your entire enterprise.
Learn more
March 20, 2020

6 min read

Protecting against coronavirus themed phishing attacks

Customers are asking us what Microsoft is doing to help protect them from phishing and cyberattacks, and what they can do to better protect themselves.
February 20, 2020

2 min read

New Microsoft Security innovations and partnerships

New innovations for built-in and cross-platform security that embrace AI.
December 18, 2019

2 min read

Data governance and retention in your Microsoft 365 tenant—a secure and highly capable solution

Microsoft 365 has a built in secure, highly capable data governance and retention capability.
October 16, 2019

5 min read

Top 6 email security best practices to protect against phishing attacks and business email compromise

What should IT and security teams be looking for in an email security solution to protect all their users, from frontline workers to the C-suite? Here are 6 tips to ensure your organization has a strong email security posture.