Identity Security: Why Microsoft’s April 2026 updates matter for your business.

The biggest identity security risks in small businesses aren't dramatic.  

They’re quiet. 

A login that was never turned off. An app connected to your Microsoft 365 tenant and forgotten. An admin account that outlived the contractor who needed it. 

Microsoft’s April 2026 updates to Defender give organisations a practical way to find and fix exactly these gaps. And for a business already running on Microsoft 365, the timing couldn't be better. 

What is identity security? 

Put simply, identity security is about controlling who can access your systems, your data, and your tools. It sounds technical, but in principle is straightforward. Every account, every app, and every automated process that can log you into your environment carries some level of risk if it isn't managed properly. 

For small businesses, that often means asking questions that don’t get asked often enough. Is the account you created for a contractor three years ago still active? Does your office manager have admin access they no longer need? Which third-party apps are still connected to your Microsoft 365 tenant? 

Why has identity security become a business issue? 

It’s rarely a sophisticated attack that causes a breach. More often it’s something quieter. 

A former employee whose login was never deactivated. A shared password used across multiple systems. An account sitting dormant with more access than anyone remembers granting. 

As businesses adopt more Microsoft 365 tools, cloud storage, and AI features like Copilot, the number of access points grows. And when permissions aren’t kept clean, the consequences aren’t just a security problem. They flow into data governance, compliance obligations, and ultimately into “who is accountable when something goes wrong?”. 

What did Microsoft update in April 2026? 

Microsoft introduced new identity security enhancements directly within the Defender portal, giving organisations a clearer picture of their identity risk without needing an enterprise security team to interpret it. 

The key additions include: 

• A new identity security dashboard that surfaces risky accounts, weak authentication configurations, and over-privileged users in one consolidated view. 
• An identity security maturity assessment that shows where your organisation sits against recommended baselines and what gaps need addressing. 
• Improved detection of non-human entities, including service accounts, app registrations, and automated processes, which are frequently overlooked but carry real risk. 

What does this mean for Microsoft 365 security? 

Better identity visibility means organisations can find and fix the access issues that accumulate over time in any Microsoft 365 environment. Temporary permissions that were never removed, forgotten admin accounts or apps still connected to the tenant from a project two years ago. The new Defender tools make these findable without a manual audit. 

For healthcare providers, not-for-profits, schools, and professional services firms, this also directly impacts data governance. Knowing who can access sensitive client, patient, or student information is not just a technical detail. It is an organisational responsibility. 

Why does identity security matter before enabling Copilot? 

Microsoft Copilot can only access what the signed-in user can access, so poor identity configuration becomes a Copilot governance problem. If permissions are over-broad or poorly managed, Copilot can surface information to users who should not see it. 

At ADITS, we treat identity and Microsoft 365 security configuration as prerequisites before recommending Copilot to any client. Microsoft's April maturity assessment gives that review process a clear starting point. 

How does this relate to the SMB 1001 Framework? 

The SMB 1001 framework includes access control as a core component, and Microsoft's new identity tools make it more practical to meet that standard. Organisations can now benchmark their identity posture directly against recommended baselines inside Defender, supporting the access control requirements of SMB 1001. 

What should your organisation do next? 

You should start with visibility. Use Microsoft's new identity dashboard to understand where your gaps are, then work through the maturity assessment to prioritise what needs attention. 

For ADITS clients, that process typically covers: 

• Reviewing user permissions and active admin accounts 
• Identifying and cleaning up inactive or over-privileged identities 
• Assessing non-human entities including connected apps and service accounts 
• Aligning configuration to the SMB 1001 access control requirements and Microsoft security baselines 
• Putting ongoing monitoring efforts in place so the picture always stays current 

Identity hygiene is not a one-off project. It becomes more important as your use of Microsoft 365 and its AI capabilities grow. 

The takeaway of Microsoft's April updates in Identity Security 

Microsoft's April 2026 identity security updates make it easier than ever for small and mid-sized organisations to see their risk, close the gaps, and build a stronger foundation for Microsoft 365 security and data governance. 

If your organisation is expanding its Microsoft 365 use, considering Copilot, or simply wants a clearer picture of who has access to what, identity security is the right place to start. 

For the latest Microsoft updates, tools, and guidance tailored to businesses like yours, visit the ADITS Microsoft Hub.