What Is Conditional Access?
Conditional Access is a Microsoft Entra ID security feature that controls who can access business applications, where they can access them from and under what conditions access should be granted.
Often described as the engine behind Zero Trust security, Conditional Access helps organisations protect Microsoft 365, cloud applications and business data from unauthorised access and cyber attacks.
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Conditional Access Explained
Traditional security assumes that if a user has the correct password, they should be allowed access. Modern cyber security no longer works that way.
Conditional Access evaluates multiple factors before allowing access to systems and data.
Conditional Access asks:
Who is logging in?
Where are they logging in from?
What device are they using?
How risky is the sign-in?
Should additional verification be required?
Why Conditional Access Matters
Protect Microsoft 365
Reduce unauthorised access to Outlook, Teams, SharePoint and OneDrive.
Reduce Account Compromise
Block risky logins before attackers gain access.
Support Zero Trust
Verify every access request rather than automatically trusting users.
Common Conditional Access Policies
Block High-Risk Countries
Prevent access attempts from locations your organisation does not operate in.
Block Legacy Authentication
Prevent insecure authentication methods often exploited by attackers.
Require Compliant Devices
Only allow managed and trusted devices to access company data.
Protect Administrators
Apply stronger security controls to privileged accounts.
Risk-Based Access
Respond automatically to suspicious login activity.
Benefits of Conditional Access
- Protect Microsoft 365 environments.
- Reduce phishing-related account compromise.
- Strengthen identity security.
- Support Cyber Essentials compliance.
- Enable Zero Trust security strategies.
- Reduce cyber insurance risk exposure.
- Protect remote workers.
- Improve security governance.
- Automate security decisions.
- Reduce unauthorised access risks.
Conditional Access and Microsoft Entra ID
Conditional Access is powered by Microsoft Entra ID and works alongside Multi-Factor Authentication, Identity Protection and Identity Governance.
Common Conditional Access Mistakes
- No MFA policy for administrators.
- Excluding privileged accounts from policies.
- Not blocking legacy authentication.
- Poor policy testing and validation.
- Too many policy exceptions.
- Failing to review sign-in risks.
- Ignoring unmanaged devices.
- Lack of ongoing policy reviews.
Frequently Asked Questions
What is Conditional Access?
Conditional Access is a Microsoft Entra ID capability that controls access to applications and data based on risk, location, device and user identity.
Does Conditional Access replace MFA?
No. Conditional Access often works alongside MFA and can enforce MFA when specific conditions are met.
Is Conditional Access included with Microsoft 365?
Conditional Access requires appropriate Microsoft Entra ID licensing and configuration.
Why is Conditional Access important?
It helps organisations prevent unauthorised access and reduce cyber security risks associated with compromised credentials.
Need Help Implementing Conditional Access?
AceGuard helps organisations design, implement and optimise Conditional Access policies to strengthen Microsoft 365 security and support Zero Trust security strategies.
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