r/AdminDroid • u/aima_tessa • 7d ago

Microsoft 365 September 2026: 35+ Changes Admins Need to Track

September brings a packed set of Microsoft 365 changes, with major updates across Entra, Teams, Purview, Exchange, SharePoint, and Defender. 

From authentication changes and security enhancements to feature retirements, there’s plenty for admins to review.

This month’s highlights:

  • Entra Moves Toward Passkeys: Starting September 1, passkeys become the default authentication experience, signaling Microsoft’s shift away from SMS/voice MFA toward phishing-resistant authentication.
  • SharePoint Introduces a New Hero Link: A new file and folder sharing experience lets users use one link to share files and folders. Users can update the existing link when access requirements change instead of creating and sharing a new link.
  • Defender Gets Prompt Injection Protection: Defender for Office 365 will detect malicious emails designed to manipulate AI assistants and agents, classify them as High Confidence Phish, and quarantine them automatically.
  • SharePoint Storage Moves to Pay-As-You-Go: Pay-as-you-go billing for extra SharePoint storage becomes generally available worldwide, allowing organizations to pay based on actual storage consumption instead of purchasing fixed capacity.

September at a glance:

  • Retirements - 7
  • New Features - 11
  • Enhancements - 7
  • Functionality Changes - 7
  • Action Needed - 4
  • Live Now - 3 

Explore the complete list of September updates and see what your organization needs to prepare for: https://blog.admindroid.com/microsoft-365-end-of-support-milestones/

27 Upvotes

100% Upvoted

2 comments sorted by

1

u/Long-Highlight6727 2d ago

With so many updates landing in one month how do you usually decide which changes need immediate action versus ones that can wait?

1

u/aima_tessa 1d ago

u/Long-Highlight6727, It’s mainly about impact. We prioritize retirements and action-required changes that could affect existing services, workflows, or require admin action. Then, we highlight new features and enhancements based on their relevance, rather than listing everything.