Microsoft 365 security assessment UK — full M365 tenant audit from £1,500. Entra ID, Conditional Access, MFA, Defender, Intune, SharePoint & DLP. Microsoft Partner, 4.9★. Call 0203 834 9728.
MICROSOFT 365
SECURITY
ASSESSMENT
Microsoft Partner · From £1,500 · 5-day turnaround
Most businesses using Microsoft 365 are missing critical security controls — often ones already included in their licence. Coreitech's M365 security assessment audits your entire tenant: Entra ID, Conditional Access, MFA, email security, Defender, Intune, SharePoint, and DLP — delivering a risk-rated findings report with a clear remediation roadmap.
Why most M365 tenants are less secure than you think
Microsoft 365 is configured out of the box with security defaults — not security best practices. Default settings prioritise user convenience over security, leaving most tenants exposed to credential attacks, phishing, data leakage, and ransomware.
In 2025, Microsoft reported that 99.9% of compromised accounts had no MFA. Yet in most M365 tenants we assess, MFA is enabled for admins but not enforced for all users — a gap attackers specifically target. Similarly, legacy authentication protocols (SMTP, IMAP, POP) are often left enabled, bypassing modern authentication entirely.
Many businesses paying for Microsoft 365 Business Premium (which includes Defender for Business, Intune, and Conditional Access) haven't configured any of these features. Our assessment identifies this unlocked value and provides the roadmap to activate it.
Assessment by Microsoft-certified engineers
Coreitech is a Microsoft Partner with certified engineers holding SC-200 (Microsoft Security Operations), AZ-500 (Azure Security), and MS-500 (Microsoft 365 Security) certifications. We manage Microsoft 365 for 200+ UK businesses — giving us direct experience of the most common security gaps across tenants of every size.
Our assessment goes beyond Microsoft Secure Score. We manually review Conditional Access policy logic, check for misconfigured exclusions, verify Intune compliance policy enforcement, and test email security controls — providing a true security picture that automated tools miss.
What our Microsoft 365 security assessment covers
Entra ID & Identity Security
Review of user accounts, admin roles, privileged identity management, guest access, and Entra ID (Azure AD) security configuration.
Conditional Access Policies
Audit of all Conditional Access policies — coverage gaps, legacy authentication blocks, location-based controls, and compliance-based access.
MFA & Authentication
MFA enforcement status across all users and admins. Authentication method strength, legacy protocol usage, and SSPR configuration.
Exchange Online & Email Security
Review of Defender for Office 365, anti-phishing policies, Safe Links, Safe Attachments, DMARC/SPF/DKIM, and transport rules.
SharePoint & OneDrive
External sharing settings, sensitivity label application, guest link permissions, and data oversharing risks across SharePoint and OneDrive.
Microsoft Defender for Business
Defender for Business / Defender for Endpoint configuration review — policy coverage, alert status, device compliance, and EDR status.
Intune & Device Compliance
Review of Intune MDM enrolment, compliance policies, configuration profiles, and device health across Windows, Mac, iOS, and Android.
Data Loss Prevention (DLP)
Review of Microsoft Purview DLP policies — coverage of sensitive data types, endpoint DLP, Teams and email policy application.
Microsoft 365 security assessment — FAQ
Book your Microsoft 365
security assessment
Fixed price from £1,500. Risk-rated findings report delivered within 5 business days. Remote — no on-site visit required.