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This article lists new security features in the latest releases of Microsoft 365 for business, which includes Microsoft 365 Business Basic, Microsoft 365 Business Standard, and Microsoft 365 Business Premium. Features that are currently in preview are denoted with (preview).
For more information about Microsoft 365 for business, see What is Microsoft 365 for business.
Tip
Microsoft 365 Business Premium includes Microsoft Defender for Business. For information about what's new in Microsoft Defender for Business, see What's new in Microsoft Defender for Business.
September 2025
- You can now add the Microsoft Defender Suite for Business Premium to your subscription. This add-on replaces the former Microsoft 365 E5 Security add-on.
March 2025
- You can now add the Microsoft Defender Suite (formerly known as Microsoft 365 E5 Security) to your Microsoft 365 Business Premium subscription. This add-on up levels your security capabilities with more protection for your organization's identities, devices, email, files, and apps. For more information, see the following resources:
July 2024
- (GA) Learning hub resources moved from the Microsoft Defender portal to free.blessedness.top. Access Microsoft Defender XDR Ninja training, learning paths, training modules and more. Browse the list of learning paths, and filter by product, role, level, and subject.
March 2024
- (Preview) Turn preview options on in the main Microsoft 365 Defender settings together with other Microsoft Defender XDR preview features. Customers who aren't using preview features yet continue to see the legacy settings under Settings > Endpoints > Advanced features > Preview features. For more information, see Microsoft Defender XDR preview features.
October 2023
October is Cybersecurity Awareness Month. See how we're making it easier for small and medium-sized businesses to stay secure.
Special pricing for new Microsoft 365 Business Premium customers. During October, we're offering special pricing for new customers. For all the details, see Security for your small or medium-sized business.
July 2023
Tip
Read all about the exciting, new capabilities releasing in July 2023 in the Tech Community blog: New SMB security innovations from Microsoft Inspire 2023.
- New training resources for Microsoft partners. A Security Managed services kit and a three-part digital training series are now available to give step-by-step guidance for partners to build services based on critical CIS cybersecurity controls. For more information, see IT partner resources to help build security services in the Tech Community blog: New SMB security innovations from Microsoft Inspire 2023.
July 2022
- Microsoft Defender for Business servers (preview) is available to customers who have at least one paid license of Microsoft 365 for business or Defender for Business. See Tech Community blog: Server protection for small business is now in preview within Microsoft Defender for Business.
March 2022
- Microsoft 365 Business Premium now includes Defender for Business. To learn more, see Tech Community blog: New security solutions to help secure small and medium businesses.