Microsoft Security Review • Entra ID • Defender XDR • Defender for Cloud • Sentinel • Purview

Most environments look secure… until you actually check.

A GEMXIT Security Review helps organisations understand what their Microsoft environment is really showing across identity, email, endpoints, data protection, Azure exposure, logging and detection. The goal is simple: find the quiet gaps across Entra ID, Defender XDR, Defender for Cloud, Sentinel, Purview and Microsoft 365 before they become expensive problems.

We don’t just ask whether security tools are enabled. We check whether they are configured properly, producing useful signals, and giving your business enough visibility to respond.

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Microsoft security review and cyber visibility

What this review is designed to answer

Do you have real visibility, or just licensed tools and dashboards? The review looks for the gap between what is installed and what is actually protecting the organisation.

Are sign-ins, MFA, Conditional Access and admin roles properly controlled?

Are Defender XDR, Defender for Cloud, Sentinel, Purview and email security producing useful investigation data?

Can you identify the risky activity that does not trigger a high-severity alert?

SigninLogs
| where ResultType == 0
| summarize SignInCount=count(), Locations=make_set(Location)
  by UserPrincipalName, IPAddress
| order by SignInCount desc

What we check

The review is focused on practical business risk, not generic checklists. It looks across the places attackers commonly abuse: identity, email, devices, cloud access, logging and visibility.

Identity and access Entra ID, MFA coverage, Conditional Access, Identity Protection, PIM, authentication methods, break-glass accounts, lifecycle workflows, access reviews, guest users and risky sign-in patterns.

Email security SPF, DKIM, DMARC posture, spoofing exposure, Defender for Office 365 signals, quarantine behaviour and phishing controls.

Endpoint protection Defender for Endpoint onboarding, EDR in block mode, ASR rules, tamper protection, device isolation readiness, vulnerability management, Intune compliance, Sophos alignment and unmanaged devices.

Cloud exposure Defender for Cloud, Secure Score, Defender CSPM, attack-path analysis, Azure Policy, Key Vault, storage exposure, RBAC, public endpoints, network posture and external-facing services.

Logging and detection Sentinel readiness, Defender Advanced Hunting, Microsoft Security Copilot, audit logs, alert quality, detection gaps and investigation workflows.

Practical remediation Clear priority list, quick wins, high-risk items and staged improvement recommendations your team can actually action.

Data security and investigation acceleration

The review can also examine how Microsoft Purview protects sensitive information and how Security Copilot can support faster, more consistent investigations.

Microsoft Purview and data protection Review Audit, sensitivity labels, Data Loss Prevention, retention, Insider Risk Management, SharePoint and OneDrive sharing, data exposure and information protection controls.

Microsoft Security Copilot Assess opportunities for incident summarisation, alert triage, KQL assistance, identity investigation, threat-intelligence context and faster analyst workflows.

What we typically find

These are the quiet security gaps that often sit inside environments for months because nothing looks obviously broken.

MFA is enabled, but not enforced everywhere Legacy access, exceptions, service accounts, weak break-glass handling or privileged users sitting outside the strongest controls.

Email authentication is present, but not finished SPF exists, DKIM may be enabled, DMARC may be set to quarantine — but spoofing exposure and policy gaps remain.

Alerts exist, but no one knows what matters Too much noise, not enough context, limited investigation process and no clear path from alert to business decision.

Data access is wider than expected Oversharing, stale guest access, weak SharePoint controls, broad permissions and limited visibility over file activity.

How the Security Review works

A simple, structured process designed to give leadership and technical teams a clear picture without burying everyone in noise.

1) Scoping call We confirm the environment, business risks, systems in scope and what level of access or export is appropriate.

2) Review and investigation We review configurations, sign-in activity, security signals, exposed services and visibility across Microsoft security tooling.

3) Findings and priorities You receive clear findings grouped by risk, impact and priority — with quick wins separated from deeper uplift work.

4) Uplift roadmap We map what to fix first, what to monitor, and where Microsoft Defender, Sentinel, Entra ID and Purview can be better used.

What you get

The output is designed for both business decision-makers and technical teams. Clear enough for leadership. Practical enough for implementation.

Security Review Report A plain-English report showing what was checked, what was found, why it matters and what to do next.

Prioritised Risk Register Findings grouped into critical, high, medium and improvement items so action can start immediately.

Executive Summary A concise summary suitable for owners, directors and managers who need business impact without technical overload.

Security Uplift Plan A staged roadmap for improving controls across identity, endpoints, email, cloud and monitoring.

Quick Wins Changes that can reduce risk quickly without waiting for a large transformation project.

Microsoft Security Direction Recommendations for getting more value from Defender, Sentinel, Entra ID, Purview and Microsoft 365 security controls.

Who this is for

This review is ideal for organisations that rely on Microsoft 365 or Azure and want a practical understanding of their security posture.

Businesses using Microsoft 365 Companies that have email, Teams, SharePoint, OneDrive, Entra ID and Microsoft security features but want stronger assurance.

Teams without a dedicated SOC Organisations that have security tools but no time, process or internal capability to regularly interpret the signals.

Leadership wanting clarity Owners and managers who want to know whether the business is actually protected, not just whether the licenses exist.

Organisations preparing for uplift Teams planning a Defender, Sentinel, Entra ID, Zero Trust, Essential Eight or Microsoft security improvement program.

Agent Foskett style investigation

The review follows the same mindset behind the Agent Foskett investigations: do not just wait for alerts — investigate the telemetry, challenge assumptions and ask the data better questions.

No alert triggered… but the telemetry told a different story. Many modern security issues do not arrive as clean, high-severity alerts. They appear as subtle identity behaviour, unusual sign-ins, suspicious email activity, inconsistent authentication, persistent sessions, exposed cloud services or access patterns that do not match normal business operations.

That is why the review focuses beyond dashboards and investigates the signals hidden inside the environment itself.

Read Agent Foskett Briefings Modern Threat Investigations View Complete KQL Threat Hunting Guide

Related GEMXIT services and learning

Continue from assessment into security uplift, identity hardening, Azure protection, training and practical Microsoft security learning.

Microsoft Security Services Defender XDR, Sentinel, Entra ID and Microsoft security operations →

Microsoft Entra ID Security Conditional Access, Identity Protection, PIM and identity governance →

Azure Security Melbourne Defender for Cloud, CSPM, Sentinel and Azure workload protection →

Microsoft Training Azure, Defender, Sentinel, Entra ID and Security Copilot training →

Agent Foskett Academy Explore practical Microsoft security lessons and investigation workflows →

Agent Foskett Hub Read investigation case files and Friday Cyber Briefings →

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