Microsoft Defender for Office 365
298
Reviews
4.5
Star rating
#3
Rank in Email Anti-spam
Pros and cons
Pros
- Ease of Use
- Security
- Office 365 Integration
- Email Security
- Integrations
- Phishing Protection
Cons
- Complexity
- False Positives
- Configuration Difficulties
- Limited Reporting
- Poor Detection
- Slow Performance
Traffic & LLM citations
Source: G2 review data
Winning from
Losing to
Key stats
-87.5%
69
Enterprise
3
Adoption by company size
| Segment | Share of reviews |
|---|---|
| Small Business | 25.2% |
| Mid-Market | 36.6% |
| Enterprise | 38.3% |
Quarterly history
| Quarter | Reviews | Star rating |
|---|---|---|
| 2024 Q4 | 2 | 4.8 |
| 2025 Q2 | 1 | 4.5 |
| 2025 Q3 | 5 | 4.2 |
| 2025 Q4 | 3 | 4.5 |
| 2026 Q1 | 2 | 4.5 |
| 2026 Q2 | 8 | 4.0 |
| 2026 Q3 | 1 | 4.0 |
Satisfaction ratings
Ease of Use9.0
Ease of Setup8.9
Quality of Support8.9
Meets Requirements9.1
What reviewers say
all in on MD 365 BUILT FOR RESILENCE AND SIMPLICITY
2.0
“Integrated Email ProtectionEmail Encryptionans spam malware protection”
Funciones de protección y seguridad útiles y confiables
5.0
“Las funciones de protección y seguridad que ofrece la aplicación me parecen muy útiles y confiables.”
Effective Email Security, Complex Dashboard
4.0
“I like that Microsoft Defender for Office 365 is an inbuilt Windows tool that acts as a default antivirus for computers and laptops. I find the features like Safe Links and Safe Attachments work effectively, providing an extra layer of protection. These features give warnings whi”