--- title: "Microsoft Defender for Office 365 Reviews 2026. Verified Reviews, Pros & Cons | Capterra" description: "Is Microsoft Defender for Office 365 the right Email Security solution for you? Explore 241 verified user reviews from people in industries like yours to make a confident choice." source_url: "https://www.capterra.com/p/219685/Microsoft-Defender-for-Office-365/reviews/" page_type: "reviews" language: "en" --- Microsoft Defender for Office 365 4.6 (241) [View alternatives](https://www.capterra.com/p/219685/Microsoft-Defender-for-Office-365/alternatives/) Provider data verified by our Software Research team, and reviews moderated by our Reviews Verification team. [Learn more](https://www.capterra.com/our-story/) * * * Last updated August 26th, 2026 # Reviews of Microsoft Defender for Office 365 Ease of use 4.5 Customer Service 4.3 ## Pros and Cons in Reviews Swetha C Technical Program ManangerAutomotive, 5,001 - 10,000 employeesUsed the software for: 1-2 years. “The platform integrates well with the Microsoft ecosystem and helps strengthen an organization's overall security posture. While there is some complexity during setup and management, the protection and security benefits make it a valuable solution for businesses of all sizes.“ May 31, 2026 Gerald W PresidentEntertainment, Self-employedUsed the software for: More than 2 years. “I use Malwarebytes as well and that gives me a lot of false positives which can be a real nuisance.“ January 21, 2025 JD Josh D IT Support EngineerInformation Technology and Services, 51 - 200 employeesUsed the software for: 1-2 years. “Microsoft Defender for Office 365 provides excellent protection against phishing, spam, malware, and other email-based threats. As it is tightly integrated with Microsoft 365, deployment and management are straightforward, and it works seamlessly alongside the wider Microsoft security ecosystem.“ July 26, 2026 MC Michelle C CEOCivic & Social Organization, 11 - 50 employeesUsed the software for: 1-2 years. “The learning curve can be frustrating.“ June 23, 2026 JD Josh D IT Support EngineerInformation Technology and Services, 51 - 200 employeesUsed the software for: 1-2 years. “Customer support has generally been satisfactory when required, although many issues can often be resolved using Microsoft's extensive documentation and built-in reporting tools. While there is a learning curve and occasional false positives to manage, the overall level of protection, automation, and visibility makes it an excellent email security solution that we would recommend to organisations of all sizes.“ July 26, 2026 Gerald W PresidentEntertainment, Self-employedUsed the software for: More than 2 years. “I haven't been able to find any way to contact direct customer support with a real person.“ January 21, 2025 JD Josh D IT Support EngineerInformation Technology and Services, 51 - 200 employeesUsed the software for: 1-2 years. “The integration with Microsoft 365 makes deployment and management straightforward, while the wide range of security features provides strong protection against modern threats.“ July 26, 2026 Gerald W PresidentEntertainment, Self-employedUsed the software for: More than 2 years. “A few years back I had some false positives, but not for a long time.“ January 21, 2025 ## Showing most helpful reviews Showing 1-25 of 241 Reviews Sort by: Most Helpful Rating Company Size Reviewer's Role Length of Use Frequency of Use Swetha C. Technical Program Mananger Automotive Used the software for: 1-2 years ### "Strong Email Security and Phishing Protection for Microsoft 365" May 31, 2026 5.0 Overall, Microsoft Defender for Office 365 has been a reliable email security solution. It significantly reduces spam, phishing attempts, and malicious email threats while providing administrators with useful visibility into security events. The platform integrates well with the Microsoft ecosystem and helps strengthen an organization's overall security posture. While there is some complexity during setup and management, the protection and security benefits make it a valuable solution for businesses of all sizes. Pros Microsoft Defender for Office 365 provides strong protection against phishing attacks, malware, and suspicious email activity. The threat detection capabilities are effective, and the integration with Microsoft 365 makes it easy to manage security policies across the organization. Features such as Safe Links and Safe Attachments add an extra layer of protection without significantly impacting user productivity. Cons The initial setup and policy configuration can be complex for organizations without dedicated security expertise. Some advanced security features require a learning curve to fully understand, and investigating alerts can sometimes generate more notifications than necessary. Review Source BL Brooke L. Student Education Management Used the software for: 2+ years ### "Microsoft Defender is the best defender" June 21, 2026 5.0 Microsoft Defender has kept my Microsoft 365 programs from being attacked by malicious or suspicious spam. Pros There is little to no learning curve. The setup, email and scan is very easily accessible. It helps to block out spam mail and malicious spam. Customer support is fast and efficient. Due to the high protection of the software, it is value for money. Cons I have yet to experience any bugs or issues with the software. I still utilize this software today and have for 2 years. Switched from [ZERO Virus Security](https://www.capterra.com/p/10014897/ZERO-Virus-Security/) Because I was told by a former co-worker that Microsoft Defender is better value for money. Review Source Heather A. Senior Loan Processor Financial Services Used the software for: 2+ years ### "I hope Microsoft really focuses more on this software again. " June 9, 2022 2.0 Pros What I like most about this software is how inexpensive it is. When you buy a new computer that has Microsoft Windows on it, it is already ready to go for the user to use. Cons What I like least is this product worked for a while but now it is back to not feeling safe when it is running. You really have to really look into this software because you have to put some effort into it. Switched from [Trellix Endpoint Security](https://www.capterra.com/p/151734/McAfee-Endpoint-Security/) Because I read reviews and I felt I could believe what I was reading when it says this product has become safer and more up-to-date compared to years ago when it did not work at all. Review Source MC Michelle C. CEO Civic & Social Organization Used the software for: 1-2 years ### "Strong Protection, But Needs Clearer User Guidance" June 23, 2026 5.0 My overall experience with Microsoft Defender for Office 365 is that it is a valuable tool, but it needs to be more user-friendly and accessible. Email security is extremely important, especially when people are handling sensitive information, public benefits, medical records, school issues, and advocacy work. However, security tools should not only protect users, they should also help users understand what is happening in clear language. Defender has useful features, but the setup, alerts, and reports could be improved so that everyday users can feel confident, informed, and protected. Pros What I liked most about Microsoft Defender for Office 365 is that it adds an important layer of protection for email, links, attachments, and potential spam or phishing attempts. For people who rely heavily on email for advocacy, school, benefits, medical care, and family communication, security matters. I appreciate that it is meant to help catch threats before they cause harm and that it works within Microsoft 365 instead of requiring a completely separate system. Cons What I liked least is that it is not always easy to understand from a regular user’s perspective. Some of the reports, alerts, and security language can feel too technical, especially for people who are not IT professionals. I would like clearer explanations, better plain-language guidance, and easier ways to understand what actually happened, what was blocked, and what action the user needs to take next. The learning curve can be frustrating. Review Source JD Josh D. IT Support Engineer Information Technology and Services Used the software for: 1-2 years ### "Strong Email Security with Excellent Microsoft 365 Integration" July 26, 2026 4.0 Our overall experience with Microsoft Defender for Office 365 has been very positive. It has significantly improved email security by reducing spam, phishing attempts, and malicious attachments reaching users. The integration with Microsoft 365 makes deployment and management straightforward, while the wide range of security features provides strong protection against modern threats. The platform offers good value for money, particularly for organisations already using Microsoft 365, as it enhances security without introducing another separate management platform. Customer support has generally been satisfactory when required, although many issues can often be resolved using Microsoft's extensive documentation and built-in reporting tools. While there is a learning curve and occasional false positives to manage, the overall level of protection, automation, and visibility makes it an excellent email security solution that we would recommend to organisations of all sizes. Pros Microsoft Defender for Office 365 provides excellent protection against phishing, spam, malware, and other email-based threats. As it is tightly integrated with Microsoft 365, deployment and management are straightforward, and it works seamlessly alongside the wider Microsoft security ecosystem. One of the biggest advantages is the visibility it provides into threats, allowing administrators to investigate emails, review detections, and take action quickly. Features such as Safe Links, Safe Attachments, anti-phishing policies, and automated remediation help reduce risk while requiring minimal ongoing administration. The platform also integrates well with other Microsoft security products, making it a strong choice for organisations already invested in Microsoft 365. From a value for money perspective, it delivers significant security benefits without requiring additional third-party email security platforms in many environments. Cons The learning curve can be steep, particularly when navigating the various security portals, policies, reports, and alerting options. New administrators may find it takes time to understand where settings and investigations are located. There can also be occasional false positives or legitimate emails being quarantined, requiring review and adjustment of policies. Some reporting and troubleshooting workflows could be more intuitive, especially when tracking why a specific email was blocked or filtered. Review Source VR Verified Reviewer Marketing Specialist Environmental Services Used the software for: 1-2 years ### "Great for Microsoft Integration" April 30, 2026 5.0 Pros I like that Microsoft has built-in security and antivirus software that connects across all of the Microsoft applications. Easy to set up and integrate across laptops, computers, and phones. Cons Staying on top of making sure everything is up to date. Because Microsoft runs across phones, computers, and laptops, for a non-tech person, it can be intimidating to make sure I'm always protected on all devices. Review Source Michelle F. Owner Consumer Services Used the software for: 6-12 months ### "A+ for Microsoft, Great Value" April 19, 2026 4.0 Easy to use, value for the money and user friendly to implement into business! Would highly recommend. Pros Value for the money, easy to learn and work with. Easy to implement into computer. File storage is very easy. Cons Glitches sometimes as Microsoft products do. Usually get nothing loading when opening the app on desktop. Review Source JB Jennifer B. Marketing and sales Consumer Services Used the software for: 2+ years ### "Great and user friendly " March 23, 2026 5.0 Pros Great to use. User friendly no huge learning curve setup is easy if you need customer support they’re always there ready and willing. Cons Nothing I really don’t like about it. It’s just so simple to use easy to access easy to trouble shoot Review Source NY Natalie Y. Office Assistant Accounting Used the software for: 1-2 years ### "Microsoft 365 helps our business" March 8, 2026 5.0 Overall, it’s a great program our small business uses it for multiple emails and it has detected many severe threats.overall for the amount of money we spend each year it is very worth it! Pros The thing I like most is it filters all the spam emails very well. It detects threats right away and I like that it keeps it separate from the focused email. The set up is very easy and self explanatory. Cons The one thing I don’t like the most is file syncing. While syncing files a very slow performance with file version conflicting. Review Source Gerald W. President Entertainment Used the software for: 2+ years ### "Good, free security suite, if you have Microsoft 365." January 21, 2025 4.0 It works in the background so I'm never really aware of it. A few years back I had some false positives, but not for a long time. I use Malwarebytes as well and that gives me a lot of false positives which can be a real nuisance. Pros Free suite of security tools that is integrated with Windows. Don't really need any other anti-virus. Cons The instructions are not very clear. It takes a while to figure out what's what and the various modules have very slight or no explanations. I haven't been able to find any way to contact direct customer support with a real person. Review Source MW Mekailah W. Ceo Entertainment Used the software for: Less than 6 months ### "What I think is important." January 24, 2026 4.0 It’s often praised for giving organizations confidence that inboxes are protected with real-time scanning and advanced threat intelligence. Pros It gives security teams confidence that sophisticated threats — like malicious links and dangerous attachments — are caught early. Cons Some advanced phishing or spoofing protections aren’t perfect and may miss high-level impersonation attacks without additional layers or tuning. Review Source IB Ian B. Prevent Manager Information Technology and Services Used the software for: 2+ years ### "Defend Your Data with MS Defender" January 3, 2025 4.0 I have had very good protection and minimal security issues while using Defender. Pros Its centralized management with O365 makes it convenient to use. Cons It can take some time to learn where to use certain tools and how to track system events. Review Source VR Verified Reviewer Director Non-Profit Organization Management Used the software for: 1-2 years ### "My Microsoft Defender for Office 365 review" June 28, 2021 5.0 If you want the least intrusive security solution for your computer, Windows Defender is the way to go. Pros Our organization was gifted Microsoft office 365 business premium for free. "Office 365 Advanced Threat Protection" anti-malware, anti-phishing, anti-spam software's has been a great addition. The best part is that it immediately triggers or alarms if any malicious item or threat is detected, and it comes with an analysis report to help you fix it. It simply protects our organization by operating behind the shield, providing us with a secure platform with an added layer of security and protection. In today's workplace, email is one of the most common and powerful forms of communication; we rely heavily on email communications with colleagues, collaborators, and donors. However, email is the most common attack vector used by threat actors to target and compromise your users in order to breach the security environment of our organization! Cons Our organization's policies determine the behavior and level of protection for predefined threats. The security team at our organization, for example, can set up fine-grained threat protection at the user, organization, and domain levels. Because new threats and challenges emerge on a daily basis, policies must be reviewed on a regular basis. Reason for choosing Microsoft Defender for Office 365 To detect malicious payloads in files, emails, and all types of external drives, we use Microsoft Defender Antivirus. It aids us in detecting any malicious load that may endanger the security of any of our systems. Review Source BH Bart H. Sr Accountmanager Information Technology and Services Used the software for: 1-2 years ### "Defender for Office 365, the basis protection" October 24, 2022 5.0 Configure a Microsoft tenant with Defender for Office 365 (or MFA) is not an option. You have to use it to be safe. It's enabled by default in our Microsoft tenants we configure/sell. With DFO 365 P1 you takes away the security concerns away from the user and let Microsoft decide if it's safe to open attachments or URL's. That's the way you want it! Pros With DFO 365 P1 you takes away the security concerns away from the user and let Microsoft decide if it's safe to open attachments or URL's. Very important license to get a higher Secure Micosoft tenant! Cons Nothing, I'm fan of this license and it's very very cheap! Review Source VR Verified Reviewer Digital Responsable Marketing and Advertising Used the software for: 6-12 months ### "recommended" November 3, 2021 5.0 A before and after in the opening of emails, especially in the workplace, to have the peace of mind of being protected against any suspicious email or unknown file. Pros It is a software that does not consume resources since it is based on the cloud and it is really a very interesting protection for the mail (I use office365) and the suite programs. It works as a perfect complement to antivirus since it can detect spam, pishing, deceptive advertisements, warn about malicious links, etc. Cons The only cons I find is that it cannot be applied or I did not find a way to apply it to products outside of Office365 like other mail managers. Review Source VR Verified Reviewer data processing Accounting Used the software for: 1-2 years ### "A normal defense for a low cost " June 25, 2021 5.0 In conclusion, if you are intelligent while opening suspicious websites or files you are not supposed to have many problems in general, this is just a safety net as the rest of the antivirus Pros I think it has the essential features that an antivirus can have, but having it included in the Microsoft package makes it a good choice Cons The assistance in the free version is very limited Switched from [AMGtime](https://www.capterra.com/p/153952/AMGtime/) Someone recommend it Review Source HM Hamish M. Owner Accounting Used the software for: 2+ years ### "Microsoft Defender for Office 365 (MDO) Reviews & Product Details" January 25, 2022 4.0 By and large, we are happy with the item. Rather than involving three or four devices for security, we can utilize one. With one item, Defender, we have every one of the elements we really want. We can utilize Defender to obstruct and screen for security purposes without requiring various different items to do various errands. It's very easy to understand. Pros We can utilize Defender to obstruct and screen for security purposes without requiring numerous different items to do various assignments. The item is extremely simple to utilize. The item I have tracked down the capacity to erase undesirable dangers beneficial.is exceptionally simple to utilize. Cons The cost could be better. It'll likewise help assuming that they can consistently refresh and update the arrangement. Consistently there's another infection transferred into the organization, and we need to continue to refresh it to distinguish this large number of things. I for one have not seen a lot of proof of how Defender can upgrade the tale of no trust for ventures. The information recuperation and reinforcement could be improved. Reason for choosing Microsoft Defender for Office 365 We fundamentally utilize the answer for security. We eliminated any remaining antivirus items like McAfee. We eliminated everything and presently use Defender as Defender covers all that all outsider items used to cover. Review Source Danial D. BDM Information Technology and Services Used the software for: 1-2 years ### "MD-365-Tool" March 15, 2022 5.0 A very good tool in the market and we can depend on safety and security. Pros Effective tools that can be used in many offices I have been using this tool for many years, which is very simple and user-friendly, It is a very big asset for the organization in the pandemic situation. We can save a lot of time and money, Great product for all terms of business. A good tool for emails and also for security purposes. Cons Sometimes it takes time to open and also in loading. Switched from [Google Workspace](https://www.capterra.com/p/247901/Google-Workspace/) For safety and security. Review Source MSA Mark Senyo A. Head of Department Hospital & Health Care Used the software for: 2+ years ### "A very practical solution to online threats" September 24, 2021 4.0 Our systems administrators can get a little overwhelmed and can take a while before completely onboarding new devices on all our security protocols. It is therefore assuring to know that these devices already come secure with the protection provided by Defender on Windows. Pros I like that it comes complete with the Windows and Office package I use. Therefore I get to avoid all the stress with software download and product licensing. For features, I like that it allows me to manually adjust its threat detection parameters to reduce the incidence of false alerts. Cons Since it comes so well integrated with my operating system, I have very little control over update schedules and upgrades. Sometimes, this can be a bit confusing -- not knowing how potent a recent update is or whether or not I would need secondary protection. Review Source VR Verified Reviewer Accountant Accounting Used the software for: 1-2 years ### "Microsoft Defender for Office 365 (MDO) Reviews and Product Details" October 14, 2022 4.0 Pros This is a fantastic tool from Microsoft that gives office 365 a variety of functions and protection. Due to the nature of our organization, it helps to secure our emails from phishing and spam. Although it is not extremely robust, the fact that it secures our emails makes up for it, and it is quite simple to set up Cons Microsoft could add more automation options for common cases like unlocking a user in the event of a false positive detection Reason for choosing Microsoft Defender for Office 365 It offers genuine serenity with additional ongoing updates to the extent that what they're searching for rather than a mark based arrangement. Review Source JS Jamal S. Cheif accountant Food Production Used the software for: 2+ years ### "Office 365" August 11, 2023 5.0 It helps me to know how to arraing all data and prapare the reports Easley Pros All is useful and helpful and easy to undrstand it Cons Nothing least I believe it is perfect and good to use it Review Source mK mostafa K. accountant Accounting Used the software for: 2+ years ### "the best to the best" July 27, 2023 5.0 Pros A cloud native security service which provides advanced threat protection for office 365. It has features like anti-phishing, anti-malware, and threat intelligence systems that helps protect against threats to emails and files. Cons All things were excellent, as for me, I see that there is nothing bad for me, and all programs are equal. Review Source MH Mohamed H. Bioinformatician Research Used the software for: 2+ years ### "Mircosoft Defender for Office 365, The best for Windows 10" July 15, 2021 5.0 I started using this software a long time ago since I upgraded from Windows 7 Vista to Windows 10. At first, I was using the default version but then later when I started studying in the university I began to use the institutional account for accessing office 365 products. This version is so amazing and more secure than the default one offering so many features. Pros Offering so much security, real-time protection, and ease to use. It's also customizable allowing the user to select features from different categories allowing full control of all the settings and preferences used. Cons Some files are deleted suddenly which I use in games and other installed programs. In some cases, I can recover those files but in other cases, It's complicated, even the software itself provides a feature to recover the fil. Review Source Ihab G. Managing Director Industrial Automation Used the software for: 2+ years ### "Effective and easy " September 10, 2023 5.0 Pros Easy to use and effective to detect any threats Cons It needs sometime to get used to deal with Review Source AN Ahmed N. head Market Research Used the software for: 2+ years ### "engineering revision" September 15, 2023 5.0 easy to use not expensive fast very useful Pros in work as like be part of company wor team Cons easy to use not expensive fast very useful Review Source Similar Products Featured