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ABT Guardian - Microsoft 365 Zero Trust Tenant Hardening

ABT Guardian is a comprehensive Microsoft 365 security hardening solution that replaces weak Microsoft defaults with Zero Trust baselines. Guardian configures over 10,000 security settings across identity, access control, devices, and data protection to achieve 90%+ Microsoft Secure Score. Trusted by 750+ financial institutions since 2001, ABT is a Tier 1 Microsoft Cloud Solution Provider with SOC 2 Type 2 certification.

The Four Pillars of Zero Trust Protection

Identity Protection: Every login verified with phishing-resistant MFA using Entra ID, FIDO2 security keys, and Privileged Identity Management. Blocks password spray attacks and credential theft.

Access Control: Smart access decisions using Conditional Access policies. Evaluates identity, device health, location, and risk signals for every login. Prevents MFA fatigue attacks with number matching and blocks impossible travel scenarios.

Device Compliance: Only organization-enrolled, compliant devices access company data. Enforced through Microsoft Intune with BitLocker encryption, Defender for Business, and compliance policies. Personal laptops and unmanaged devices blocked.

Data Protection: Controls what leaves your organization using Microsoft Purview DLP. Detects bulk exfiltration attempts, enforces sensitivity labels, auto-encrypts confidential files, and maintains comprehensive audit logging.

Attacks Blocked by Guardian

Guardian protects against eight major attack categories: Password spray attacks using automated credential guessing against accounts. Phishing attempts with fake Microsoft login pages stealing credentials. Legacy authentication exploits using outdated email protocols to bypass MFA. Unmanaged device access from personal laptops trying to reach company data. MFA fatigue attacks bombarding users with push notifications. Impossible travel logins appearing from suspicious geographic locations. Data exfiltration through bulk file downloads. Brute force attacks with repeated login attempts.

Compliance Frameworks and Certifications

Guardian aligns Microsoft 365 configuration with GLBA (Gramm-Leach-Bliley Act) requirements for financial institutions, FFIEC IT examination expectations, SOC 2 compliance frameworks, GSE cybersecurity expectations for mortgage lenders, and cyber-insurance control questionnaires. ABT maintains SOC 2 Type 2 certification and provides vendor risk documentation for banking, mortgage, insurance, and other regulated industries.

Microsoft Technologies Configured

Guardian configures: Microsoft Entra ID (formerly Azure AD) for identity management. Conditional Access for adaptive access control. Microsoft Intune for device management and compliance. Microsoft Defender for Office 365 and Endpoint protection. Microsoft Purview for data loss prevention and information protection. Token protection against session hijacking. Windows Hello for Business passwordless authentication. Privileged Identity Management for admin access governance.

Protection Details

Phishing-Proof Login: Requires physical security keys using FIDO2 and passkeys. Attackers cannot steal passwords because passwords alone do not grant access.

Smart Access Rules: Automatic threat detection blocking suspicious logins based on behavior patterns through risk-based Conditional Access policies.

Modern Auth Only: Old exploits disabled by turning off outdated IMAP, POP3, and basic authentication protocols.

Managed Devices Only: Your devices, your data. Personal devices blocked through Intune enrollment requirements.

Verified Push: Stops accidental approvals by requiring code match through number matching MFA instead of simple tap-to-approve.

Location Check: Impossible travel blocked through geo-fencing and travel risk evaluation.

Data Loss Prevention: Stops bulk downloads and flags unusual file activity through Purview DLP policies and sensitivity labels.

Brute Force Block: Auto-locks accounts after repeated failures through smart lockout with adaptive throttling.

Why Choose ABT Guardian

Guardian Security Baseline is included at no additional cost when purchasing Microsoft 365 licensing through ABT. Organizations pay the same as buying direct from Microsoft but receive pre-hardened configuration, ongoing security monitoring, Secure Score tracking, compliance documentation, and access to ABT's security engineering team. ABT serves as front-line support and manages Microsoft escalations when needed. Implementation typically completes in 2-4 weeks.