# Microsoft Defender for Office 365 Reviews 2026. Verified Reviews, Pros & Cons | Capterra > Is Microsoft Defender for Office 365 the right Email Security solution for you? Explore 237 verified user reviews from people in industries like yours to make a confident choice. Source: https://www.capterra.com/p/219685/Microsoft-Defender-for-Office-365/reviews --- Microsoft Defender for Office 365 4.6 (237) [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 March 15th, 2026 # Reviews of Microsoft Defender for Office 365 Ease of use 4.5 Customer Service 4.3 ## Pros and Cons in Reviews NY Natalie Y Office AssistantAccounting, 11 - 50 employeesUsed the software for: 1-2 years. “The thing I like most is it filters all the spam emails very well.“ March 8, 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 SH Shari H Independent ContractorE-Learning, Self-employedUsed the software for: More than 2 years. “I also like using the other Microsoft suites as well, such as publisher OneNote or any other new product that may be out there.“ June 30, 2025 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 Beatrice K Marketing SpecialistEnvironmental Services, 51 - 200 employeesUsed the software for: 1-2 years. “Easy to set up and integrate across laptops, computers, and phones.“ April 30, 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 HG Harley G Sr. IT TechnicianInformation Technology and Services, 2 - 10 employeesUsed the software for: More than 2 years. “We use it for all of our clients, and once we learned how to set it up correctly it worked a treat.“ July 28, 2025 Gerald W PresidentEntertainment, Self-employedUsed the software for: More than 2 years. “The instructions are not very clear.“ January 21, 2025 ## Showing most helpful reviews Showing 1-25 of 237 Reviews Sort by: Most Helpful Rating Company Size Reviewer's Role Length of Use Frequency of Use 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 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 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 HG Harley G. Sr. IT Technician Information Technology and Services Used the software for: 2+ years ### "Solid workhorse system, would recommend for any 365 based companies" July 28, 2025 4.0 We've had a good experience with it so far. We use it for all of our clients, and once we learned how to set it up correctly it worked a treat. We had a few issues with allowing mailing lists, as the phishing defence might have been a little too good at it's job, but aside from that it's been great. Pros Good system, feature rich and well priced. E-mail defence systems are extremely good and allow great granular control. Cons Customer support is slow, documentation can be a bit daunting for newer users, but once it's set up it's solid. Anti-impersonation systems might not always work, so don't rely on that system. 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 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 SH Shari H. Independent Contractor E-Learning Used the software for: 2+ years ### "The Microsoft defender review" June 30, 2025 5.0 My overall experience with Microsoft office 365 is a great experience. I love that I can use all three suites ranging for Microsoft Office word PowerPoint or access if needed. I also like using the other Microsoft suites as well, such as publisher OneNote or any other new product that may be out there. Pros I like that this type of software helps keep your Microsoft accounts protected and also if you’re using Microsoft Office, it helps keep Microsoft Office protected and keeps hackers from trying to get into your accounts when you least expect it. It also keeps viruses and threats from happening as well. Cons I have not seen any cons about the software. The software overall is very good and I trust it when I am using my Microsoft accounts.. 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 AO Alvin O. Cyber Security Specialist Information Technology and Services Used the software for: 2+ years ### "Anti-phishing controls for active inboxes." August 27, 2025 4.0 Phishing and malware protection were enhanced, auto-quarantine reduced malicious emails, and safe download warnings safeguarded our team files. Pros Real-time spam and threat protection of secure team messages, with guidance for configuring attachments and storage of files. Cons Steep learning curve when configuring advanced rules or email routing, and support documentation isn't always compatible with our usage scenario. Review Source AS Alisha S. Editor Translation and Localization Used the software for: 1-2 years ### "Great, easy to use scans" May 25, 2025 5.0 Microsoft Defender scans are so good that I don't have to buy an additional software. It is easy to execute, has a clean interface, and covers not only email but also Microsoft Teams. It even scans attachments. Overall, a great product that runs automatically and smoothly. Pros It is literally the easiest antispam program out there. Since it has the big name of Microsoft, I know I'm getting the best protection out there. Cons It would be nice to get some extra information about the files that it scans, just to assure me of everything that was checked. Review Source AB Amber B. Executive Director Health, Wellness and Fitness Used the software for: 6-12 months ### "This is the best defender ever" April 10, 2025 5.0 The protection it offers is amazing. I have liked every touch of the security it offers throughout my emails and onedrive. Pros The security it offers give me relief when it comes to receiving emails. It will actually flag emails and then I get an email weekly stating what emails were blocked and if I would like to open them. Cons The process for logging into different devices is a bit complicated and time consuming. 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 TN Tovian N. Manager Non-Profit Organization Management Used the software for: 2+ years ### "Microsoft Defender is a Powerhouse " March 20, 2022 5.0 I communicate with people and use the Internet every day for business and other transactions. Thanks to this powerhouse software, I can perform these daily tasks securely. Pros Users can easily detect, review and respond to incidents and threat alerts. The software works online and the subscription price is affordable. Integration with Microsoft Office Suite (Excel, PowerPoint, Outlook, Skype, and Word, Excel) is seamless. Microsoft also offers its users regular automatic updates and additional OneDrive storage. Cons The product is affordable but upgrading is a bit costly. Review Source EA Evelyn A. Sociologist Civic & Social Organization Used the software for: 2+ years ### "The use of Zoom in my daily life" June 29, 2022 5.0 in general I recommend the functions that the software gives, since I have never had problems and I consider that its use is very safe Pros What I like most about the software is the security that is provided for my files, as well as the available functions that make my daily work easier Cons all the functions seem to me extremely important besides that they are very safe, so there is something that I do not like 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 Jason G. CEO Entertainment Used the software for: 1-2 years ### "Microsoft Defender" May 16, 2022 5.0 Would highly recommend it, very good at defending against spam and other threats. Pros Love it, no other words, great for protection, didn't think I was going to like it but well, still have it. Cons Nothing really to complain about, does its job with little impact on performance. Review Source Similar Products Featured