Microsoft 365 & Entra ID Security Audit

Independent security audit of your Microsoft 365, Entra ID, and Intune configuration - benchmarked against CIS and Microsoft standards to surface misconfigurations, risky permissions, and identity attack paths.

CIS Microsoft 365 BenchmarkMicrosoft Secure ScoreCISA SCuBASOC 2ISO 27001NIST 800-53HIPAA
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Microsoft 365 & Entra ID Security Audit - Atlant Security
Former Microsoft Security Consulting team - insider knowledge of Entra ID, Intune, and Defender architecture
Benchmarked against CIS Microsoft 365, Microsoft Secure Score, and CISA SCuBA
Covers the whole tenant, not just identity - Intune, Defender, Purview, and external sharing included
No global admin access required - screen-sharing sessions, your team stays in control
Prioritized, step-by-step remediation plan delivered within one week
Fixed-price proposals - transparent pricing within 24 hours of scoping
Pay-after-delivery model - you review the report before we invoice

What is Microsoft 365 & Entra ID Security Audit?

Microsoft 365 has become the operational core of most organizations - identity, email, files, devices, and collaboration all run through it. That also makes it the single richest target for attackers, and the most common place where a quiet misconfiguration turns into a breach. Our Microsoft 365 and Entra ID Security Audit is an independent, configuration-level review of your entire Microsoft cloud tenant. Led by former Microsoft Security Consulting team members, we evaluate Entra ID (Conditional Access, MFA coverage, legacy authentication, Privileged Identity Management, admin role assignments, app registrations and consent grants), Microsoft Intune (device compliance policies, configuration profiles, app protection / MAM policies, enrollment restrictions, and patch posture), and the Microsoft Defender and Purview stack (Defender for Office 365, Defender for Endpoint, Safe Links and Safe Attachments, DLP, retention, and sensitivity labels). We also review the data-sharing surfaces that leak most often: Exchange Online mail flow and transport rules, SharePoint and OneDrive external sharing, and Teams guest access. Every finding is benchmarked against the CIS Microsoft 365 Benchmark, Microsoft Secure Score, and CISA's SCuBA baselines. No global admin credentials are required - the entire audit runs over screen-sharing sessions with your IT team present, so you keep full control of what is shown. Data collection takes 2-5 business days, with the final report delivered within one week. The output is a prioritized, step-by-step remediation plan that maps each misconfiguration to its business risk and the exact setting to change - including the Conditional Access gaps and over-privileged admin roles that attackers use to move from a single phished mailbox to full tenant control.

For small projects and ad-hoc work outside our pre-agreed packages or retainers, our standard hourly rate is $460.

Who Needs Microsoft 365 & Entra ID Security Audit?

Organizations that run identity, email, files, and devices through Microsoft 365 and Entra ID

Teams rolling out or expanding Microsoft Intune for device and app management

Companies that have enabled MFA and Conditional Access but never had the configuration independently verified

Regulated businesses needing SOC 2, ISO 27001, HIPAA, or NIST evidence for their Microsoft cloud

Organizations recovering from a business email compromise or token-theft incident

IT teams inheriting a tenant configured by a previous admin or MSP with unknown history

Ready to get started?

Schedule a free scoping call with our Microsoft Security alumni. Fixed-price proposal within 24 hours.

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Our Methodology

01 - Step

Discovery

Scoping your tenant: licensed workloads, Entra ID configuration, Intune footprint, and connected applications.

02 - Step

Configuration Analysis

Reviewing Conditional Access, privileged roles, Intune policies, Defender, and sharing controls against CIS and Microsoft benchmarks.

03 - Step

Risk Prioritization

Scoring each finding by exploitability and business impact, from critical identity gaps to hardening opportunities.

04 - Step

Remediation Roadmap

Delivering a step-by-step plan with the exact settings to change, prioritized by risk.

What You Get with Microsoft 365 & Entra ID Security Audit

  • Entra ID Identity & Conditional Access Review
  • MFA Coverage & Legacy Authentication Audit
  • Privileged Identity Management (PIM) & Admin Role Review
  • App Registration, Enterprise App & Consent Grant Audit
  • Microsoft Intune Device Compliance & Configuration Profiles
  • Intune App Protection (MAM) & Enrollment Restrictions
  • Defender for Office 365 & Defender for Endpoint Posture
  • Exchange Online, SharePoint & Teams External Sharing Controls
  • Microsoft Purview DLP, Retention & Sensitivity Labels

Microsoft 365 & Entra ID Security Audit Pricing

Small Business

Focused audit for small teams on Microsoft 365.

From $1,450*per project
  • Up to 150 users
  • Entra ID + Conditional Access review
  • Intune device & app policy audit
  • Defender for Office 365 review
  • External sharing & DLP check
  • Prioritized remediation plan
  • Pay after report delivery
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Most Popular

Mid-Market

Full-tenant audit for growing organizations.

From $2,755*per project
  • 150 to 1,000 users
  • Everything in Small Business
  • Privileged Identity Management (PIM) review
  • Full Intune (MDM + MAM) audit
  • Defender for Endpoint posture
  • Purview DLP, retention & sensitivity labels
  • Executive + technical reports
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Enterprise

Multi-tenant and complex enterprise environments.

Custom*scoped quote
  • 1,000+ users
  • Multiple tenants / hybrid identity
  • All Microsoft 365 & Entra workloads
  • Intune + Autopilot + co-management review
  • Defender XDR & Purview deep dive
  • Custom compliance mapping (SOC 2 / ISO / HIPAA)
  • Dedicated remediation roadmap
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* Listed prices are starting prices. The final price may change if scoping reveals significant environment complexity or material deviations from security standards.

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