Why Regular M365 Tenant Audits are Crucial
Over time, Microsoft 365 tenants organically accumulate technical debt: former employee accounts retaining active licenses, dormant guest user invites with access to internal Teams, outdated conditional access rules, and default security settings that leave organizations vulnerable to credential phishing and session hijacking.
A comprehensive Microsoft 365 Tenant Health Check typically uncovers 15% to 25% in annual license cost savings while dramatically lifting your Microsoft Secure Score to meet the Australian Cyber Security Centre (ACSC) Essential Eight standards.
Key Audit Focus Areas
1. License Rationalization & Cost Reduction
- Identify unassigned, orphaned, or duplicate licenses (e.g. users assigned both standalone Power BI Pro and E5 suites).
- Detect inactive accounts that haven't authenticated in 90+ days.
- Evaluate feature utilization to determine if users on costly E5/Business Premium tiers can be transitioned to right-sized SKUs without losing core functionality.
2. Identity & Access Hardening (Essential Eight Alignment)
- Enforce 100% MFA: Eliminate legacy authentication protocols (IMAP/POP/SMTP Basic Auth) that bypass Multi-Factor Authentication.
- Conditional Access Baseline: Configure geo-blocking policies, require compliant device health checks (Intune), and enforce risk-based sign-in controls.
- Privileged Identity Management (PIM): Eliminate permanent Global Admin assignments, implementing Just-In-Time (JIT) role elevation with approval workflows.
3. External Sharing & Guest Governance
Audit external collaboration settings in SharePoint, OneDrive, and Teams. Configure automated Access Reviews in Microsoft Entra ID to require project owners to recertify external guest access every 90 days.
4. Email Security & Anti-Phishing Defense
Verify that your corporate email domains enforce strict SPF, DKIM, and DMARC records (with p=reject or p=quarantine) to protect your brand reputation against executive impersonation and business email compromise (BEC).
Schedule a professional Microsoft 365 tenant audit with Ultron Developments' certified engineers.
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