CISO-led Microsoft 365 security audit cost estimate

Microsoft 365 Security Audit Pricing

Know what it may cost to review Microsoft 365 identity, email, sharing, administrator access, and security controls before a compromise, insurance renewal, or compliance review.

  • MFA and Conditional Access
  • Exchange Online and email protection
  • SharePoint, OneDrive, and Teams sharing

Focused OC Security Audit starting price

$1,295one-time starting estimate

Final scope and fees are confirmed in writing.

Ali Hassani, CISO, brings 25+ years of IT, cybersecurity, compliance, network, Microsoft, and infrastructure experience to each engagement.

Microsoft 365 email, identity, and access security review workspace

Instant service pricing estimate

Estimate your Microsoft 365 security audit cost.

Choose the closest answer for ten simple scope questions. The estimate updates in your browser and does not collect or transmit your selections.











Professional audit deliverables

Turn Microsoft 365 findings into an actionable security plan.

The engagement turns technical and documentation review into clear priorities for leadership, IT, vendors, and follow-up validation.

Deliverables included with your assessment

  • Executive summary of the most important Microsoft 365 risks and business impact.
  • Tenant-specific findings for identity, email, sharing, applications, devices, and logging.
  • Prioritized remediation roadmap with quick wins and configuration dependencies.
  • Administrative-role and access-control observations for leadership and IT teams.
  • Evidence checklist for cyber insurance, customer reviews, or compliance readiness.
  • Optional follow-up validation after the agreed remediation work is completed.

What the service reviews

Review the Microsoft 365 controls that shape business risk.

Identity and administrator access

Review privileged roles, MFA coverage, Conditional Access, break-glass accounts, guest access, and risky sign-in handling.

Email and collaboration exposure

Examine Exchange protections, mailbox forwarding, transport rules, anti-phishing controls, external sharing, and application consent.

Monitoring and evidence

Check audit logging, alert ownership, retention, Defender capabilities, Intune coverage, and evidence that security settings are maintained.

For scope context, review OC Security Audit’s Microsoft 365 Security Audit service and the authoritative Microsoft Zero Trust guidance. A related free readiness tool can help identify questions before a professional engagement.

Experienced, independent guidance

Reviewed by Ali Hassani, CISO.

Ali connects Microsoft cloud configuration to practical business exposure, not just a list of portal settings.

Ali Hassani is a CISO, cybersecurity and IT consultant, and infrastructure leader with 25+ years of experience. Certifications include CISSP, CCISO, CCNP, CCNA, MCSE, MCSA Security, MCITP, MCP, and MCTS. Learn more about Ali Hassani.

Pricing questions

What clients usually ask before scheduling.

What affects Microsoft 365 security audit cost?

User count, tenant count, administrator roles, Conditional Access, email protection, external sharing, Intune, Defender, and documentation depth are the main pricing factors.

Does the audit make changes to our tenant?

The base engagement is a review and reporting service. Any remediation work, change window, or implementation support is scoped separately and requires customer approval.

How long does a Microsoft 365 audit take?

A focused small-business review is often completed within one to three weeks after access, scope, and evidence are ready. Larger or multi-tenant environments require more time.

Confirm the right scope before you commit.

Call for a confidential conversation or send the basic environment details you already have. OC Security Audit will confirm objectives, exclusions, access, timing, deliverables, and a written fee.

This estimator is for initial guidance only and does not replace a professional cybersecurity audit, compliance assessment, penetration test, legal/compliance review, or written proposal. Do not enter confidential information. Final scope and fees are confirmed in a written proposal.