Microsoft 365 Security Overview
Who This Is For
Small to Medium Businesses
Get enterprise‑grade protection without needing an in‑house security team.
Enterprise Organizations
Apply consistent security policies across large user bases and multiple locations.
Startups
Build a secure Microsoft 365 environment from day one with best‑practice controls.
IT Departments
Strengthen security posture without increasing administrative complexity.
Other
Any organisation using Microsoft 365 benefits from correctly configured security controls.
Problems this solves
Phishing and email attacks
Phishing and email attacks
Email remains the most common entry point for cyber attacks.
Weak access controls
Weak access controls
Users accessing data without proper verification increases risk.
Data leakage
Data leakage
Sensitive information can be shared or accessed unintentionally.
Inconsistent security
Inconsistent security
Different users, devices, or locations often have different levels of protection.
How we work
Discover
We start with a free, high‑level Teams meeting (or phone call) to understand your business and what you need.
Assess
If you proceed, we carry out a free initial assessment of each site and shared systems to establish a clear baseline.
Agree
We review our findings in plain English and agree priorities together, with no charge and no obligation.
Support
Once support is in place, we provide ongoing IT support with monthly assessments and annual reviews to keep your IT secure and aligned.
Is Your Microsoft 365 Properly Secured?
Microsoft 365 includes powerful security features, but they are not fully enabled or configured by default.
Book a free consultation to review your Microsoft 365 security, identify any risks, and ensure your business is properly protected.
No cost. No obligation. Just a clear assessment.
What's Included
What's Included
How Our Microsoft 365 Security Service Works
Why Choose d8a?
Free Assessments
Discover opportunities for improvement with no initial cost.
Efficient Workflows
We streamline IT processes to save you time and boost productivity.
Consistent Service
Expect reliable support and performance, every time.
Free Consultation
Get expert insights tailored to your business, on the house.
Well Organised
Our team operates with precision, keeping every project on track.
Years of Experience
Decades of expertise guide our every solution.
Ready to Upgrade Your IT Infrastructure?
Book a Free Assessment today and discover how we can help your business thrive with the right technology.
Areas we cover
Providing expert IT support and infrastructure services across London and the South East.
What our customers say
Frequently Asked Questions
What is Microsoft 365 Security?
Microsoft 365 Security is a collection of built‑in and advanced protection tools that secure your users, devices, email, data, and collaboration tools across Microsoft 365. It includes anti‑phishing, anti‑malware, identity protection, device management, encryption, and Zero Trust controls
Why is securing Microsoft 365 so important?
Microsoft 365 is the core platform for email, files, Teams, SharePoint, and identity. If it’s not configured correctly, businesses face risks such as:
- Phishing and impersonation attacks
- Data leakage
- Compromised accounts
- Unmanaged devices accessing sensitive data
- Incorrect permissions and oversharing
Microsoft states that MFA, secure admin accounts, preset security policies, and device protection are essential to reduce these risks.
What security features are included in Microsoft 365?
Key built‑in protections include:
- Anti‑phishing, anti‑spam, anti‑malware
- Multi‑factor authentication (MFA)
- Conditional Access
- Encryption for data in transit and at rest
- Secure collaboration controls
- Device management (MDM/MAM)
- Microsoft Defender for Office 365 (depending on licence)
What does D8A’s Microsoft 365 Security service cover?
D8A provides a full security hardening service, including:
- MFA and Conditional Access configuration
- Admin account protection
- Email security policies (Safe Links, Safe Attachments)
- Device protection and compliance policies
- Secure Teams, SharePoint, and OneDrive setup
- Data Loss Prevention (DLP) and sensitivity labels
- Encryption and secure sharing rules
- Ongoing monitoring and support
What is Zero Trust and how does Microsoft 365 use it?
Zero Trust is a security model that assumes no user, device, or app is trusted by default — every access request must be verified.
Microsoft 365 uses Zero Trust principles such as:
- Least privilege access
- Strong identity verification
- Continuous monitoring
- Conditional Access policies
- Enforced device compliance
How does Microsoft 365 protect email?
Microsoft 365 includes:
- Anti‑phishing and spoof protection
- Safe Links to block malicious URLs
- Safe Attachments to scan files
- Encryption options for sensitive messages
- Defender for Office 365 for advanced threat protection (Plan 1/2)
How does Microsoft 365 secure files in SharePoint, OneDrive, and Teams?
Security is enforced through:
- Encryption at rest and in transit
- Secure Real‑Time Transport Protocol (SRTP) for Teams media streams
- Access controls and permissions
- Sensitivity labels and DLP
- Conditional Access for risky sign‑ins
How does Microsoft 365 protect devices?
Depending on your licence, Microsoft 365 provides:
- Basic Mobility & Security (MDM)
- Microsoft Intune (MDM + MAM)
- Device compliance policies
- Endpoint protection via Microsoft Defender for Business
What are the most important steps to secure Microsoft 365?
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Ready to Upgrade Your IT Infrastructure?
Book a Free Assessment today and discover how we can help your business thrive with the right technology.