Microsoft Exchange Online Protection (EOP) is a comprehensive email filtering and security service designed to protect organizations from spam, malware, and other email-based threats. It provides advanced threat protection, anti-malware and anti-spam filtering, and data loss prevention capabilities.
With EOP, organizations can ensure the security and integrity of their email communications. It uses multiple layers of filtering and scanning to detect and block malicious content, including phishing attempts, viruses, and ransomware. EOP also leverages machine learning and artificial intelligence to continuously improve its threat detection capabilities.
In addition to its robust security features, EOP offers advanced anti-spam filtering to reduce unwanted and unsolicited emails. It uses a combination of reputation-based filtering, content filtering, and sender authentication techniques to identify and block spam messages.
EOP also includes data loss prevention (DLP) capabilities to prevent sensitive information from being leaked or shared inappropriately. It allows organizations to define policies to detect and prevent the transmission of sensitive data, such as credit card numbers or social security numbers, via email.
Furthermore, EOP integrates seamlessly with Microsoft Exchange Online and other Office 365 services, providing a unified and integrated email security solution. It can be easily managed through the Exchange admin center, allowing administrators to configure and monitor security settings, review reports, and manage quarantined emails.

| Product | Market Share (%) |
|---|---|
| Microsoft Exchange Online Protection (EOP) | 1.1% |
| Microsoft Defender for Endpoint | 10.6% |
| F-Secure Total | 5.0% |
| Other | 83.3% |
| Type | Title | Date | |
|---|---|---|---|
| Category | Anti-Malware Tools | Dec 29, 2025 | Download |
| Product | Reviews, tips, and advice from real users | Dec 29, 2025 | Download |
| Comparison | Microsoft Exchange Online Protection (EOP) vs Microsoft Defender for Endpoint | Dec 29, 2025 | Download |
| Comparison | Microsoft Exchange Online Protection (EOP) vs Check Point Harmony Endpoint | Dec 29, 2025 | Download |
| Comparison | Microsoft Exchange Online Protection (EOP) vs SentinelOne Singularity Complete | Dec 29, 2025 | Download |
| Title | Rating | Mindshare | Recommending | |
|---|---|---|---|---|
| Microsoft Defender for Endpoint | 4.1 | 10.6% | 95% | 210 interviewsAdd to research |
| Microsoft Defender for Office 365 | 4.2 | N/A | 96% | 60 interviewsAdd to research |
| Company Size | Count |
|---|---|
| Small Business | 23 |
| Midsize Enterprise | 7 |
| Large Enterprise | 10 |
| Company Size | Count |
|---|---|
| Small Business | 339 |
| Midsize Enterprise | 221 |
| Large Enterprise | 557 |
Microsoft Exchange Online Protection (EOP) was previously known as Microsoft EOP, MS Exchange Online Protection.
| Author info | Rating | Review Summary |
|---|---|---|
| Cloud Consultant at Ensono | 4.0 | I've used Microsoft Exchange Online Protection (EOP) for five years as a service provider; it's stable, scalable, and effective for email filtering, though reporting and automated malware detection could improve. Overall, it's affordable and integrates well with Microsoft tools. |
| System Administrator at Shubham housing finance | 5.0 | I administer Microsoft Exchange Online Protection, resolving user issues such as connectivity problems and service breaks. With proper certification, EOP is easy to manage and offers enhanced features and security, making it ideal for corporate environments. |
| General Manager at Ambient iT | 4.5 | I use Microsoft Exchange Online Protection to safeguard customer emails, finding its security features robust and logs easy to manage. While search functionality could improve, it has reduced security incidents and enhanced productivity compared to previous solutions like Proofpoint and Graphus. |
| Cybersecurity Engineer at Altia Group | 3.0 | I've used Microsoft Exchange Online Protection for three years and find its phishing protection and interface excellent, though improvements in sandbox features, pricing, and first-level support are needed. I rate it 6 out of 10 overall. |
| Sr. System Engineer at Infopercept | 3.5 | We use Microsoft Exchange Online Protection to block suspicious email links, but it lacks comprehensive phishing protection and proper reporting features. Despite straightforward policy configuration, we're considering alternatives due to the need for a user-friendly dashboard and explorer features. |
| Reg Office Software Technology Parks of India Building at Dr.Computer | 4.5 | We deploy Microsoft Exchange Online Protection as part of the Microsoft 365 suite to enhance email security for our clients. The solution effectively protects against malware and phishing, though its stability needs improvement, prompting us to explore FortiMail. |
| Head Of Information Technology at a government with 201-500 employees | 4.5 | I have been using Microsoft Exchange Online Protection for managing emails and other Microsoft products like Word and Excel. It provides effective antivirus protection but could improve rule settings. I also considered alternatives like Zimbra and Google Workspace. |
| Deputy Manager at B-Trac Technologies Ltd. | 4.5 | Microsoft Exchange Online Protection offers valuable features like DLP, Safe Attachment, and Safe Links, with a useful Litigation Hold feature. However, advanced security requires a Plan 2 license, which adds costs, unlike open-source alternatives like Zimbra. Microsoft should enhance phishing and spam solutions. |