MICROSOFT 365 SECURITY

Microsoft 365 Security: Beyond Default Settings

Out-of-the-box Microsoft 365 is not secure. GCIT hardens every tenant with Conditional Access, MFA enforcement, email protection, and endpoint security, using 1,300+ custom automation scripts.

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GCIT PowerShell automation for Microsoft 365 security

Why Default M365 Settings Are Not Enough

Microsoft gives you powerful tools, but they are not configured securely out of the box. Most businesses are running M365 with critical security gaps.

Conditional Access

Control who can access your data, from where, and on which devices. Block risky sign-ins automatically based on location, device compliance, and risk level.

MFA Enforcement

Multi-factor authentication across all users with phishing-resistant methods. We configure MFA properly: not just enabled, but enforced with the right Conditional Access policies.

Email Protection

Defender for Office 365, anti-phishing policies, safe links, safe attachments, and DMARC/SPF/DKIM configuration to prevent domain impersonation.

Endpoint Security

Defender for Endpoint deployed and configured with attack surface reduction rules, automated investigation, and real-time threat detection across all managed devices.

Identity Protection

Entra ID Protection monitoring for risky users, impossible travel, and credential breaches. Automated responses to detected threats including forced password resets.

Secure Score Optimisation

We track and improve your Microsoft Secure Score. Our clients' average Secure Score is about 1.8x the Microsoft average for organisations with 101 to 1,000 seats (October 2026), because our automation enforces best practices consistently.

How We Automate M365 Security

We do not configure security manually. Our PowerShell automation ensures every tenant gets the same enterprise-grade baseline.

GCIT's security automation library includes purpose-built scripts for every aspect of M365 hardening:

  • Conditional Access Reporting: Automated policy coverage analysis across all tenants, identifying gaps in CA policy application
  • Exchange Best Practice Enforcement: Auto-disabling external forwarding rules, blocking legacy auth, configuring anti-spoofing transport rules
  • DMARC Status Monitoring: Continuous DMARC compliance checking with automated alerting for policy drift
  • Breached Account Detection: Automated HaveIBeenPwned checks across all managed user accounts with instant notification
  • Auth Methods Auditing: Regular MFA method reporting to ensure all users are on phishing-resistant authentication
GCIT PowerShell security automation

Why Microsoft 365 Security Matters

Email and identity-based attacks are the most common and most expensive breach vectors. Here's what the data tells us.

Email-Based Attacks Are the Most Expensive

Email-Based Attacks Are the Most Expensive

Phishing and business email compromise remain the costliest attack vectors globally, with average breach costs exceeding $4.6M USD. For Australian businesses relying on Microsoft 365, securing email and identity is the highest-impact investment.

Source: IBM Cost of a Data Breach Report 2024

The Right Controls Block Most Attacks

The Right Controls Block Most Attacks

Multi-factor authentication alone blocks 99% of credential-based attacks. Combined with Conditional Access and DMARC, these controls form a defence-in-depth approach that dramatically reduces your attack surface.

Source: Microsoft Digital Defense Report 2024

Our Approach to M365 Security

01

Audit

We run a comprehensive security audit: Secure Score, Conditional Access policies, MFA status, sharing settings, admin roles, and mail flow rules.

02

Harden

Our automation deploys security policies based on Microsoft best practices and our experience hardening hundreds of tenants. Every setting is deliberate.

03

Monitor

Ongoing automated monitoring of sign-in anomalies, policy drift, and new threats. Our scripts catch configuration drift before it becomes a risk.

04

Report

Monthly security reports showing Secure Score trends, blocked threats, CA policy effectiveness, and actionable recommendations.

Get a Free M365 Security Review

We will audit your Microsoft 365 tenant and show you exactly where the security gaps are. No cost, no obligation, just a clear picture of your current risk.

Ready to secure and simplify your IT? Talk to a GCIT expert today.