Successful phishing campaigns have shown that multifactor authentication (MFA) can be bypassed when an attacker convinces a user to approve a request or surrender a session token. MFA still matters. It raises the barrier to account compromise, but it cannot carry your identity security program by itself.

If you’re using Microsoft Entra ID, formerly Azure Active Directory, and Microsoft 365, you need several defenses working together. Phishing simulation training helps employees recognize the requests attackers use. Conditional Access Policies (CAPs) determine when access should be allowed, challenged, or blocked. Monitoring and alerting help you recognize activity that deserves investigation.

Azure MFA security is stronger when these controls support one another and your leadership can see where exceptions remain.

Conditional Access Protects the Sign-In

Conditional Access Policies protect the beginning of the identity chain: the sign-in attempt. A CAP evaluates configured conditions and decides whether a user can access a Microsoft cloud service. The decision can account for identity, location, device state, application, risk signals, and other information available in the environment.

One policy cannot cover every scenario. You may combine policies that require MFA, restrict sign-ins from selected locations, and require a compliant or appropriately joined device. Each policy addresses part of the risk. Together, they create broader coverage than a single rule can provide.

You should be able to explain what each policy protects, which users and applications it covers, and what happens when a condition is not met. That understanding matters when an employee cannot reach a needed system and when an attacker tests the edges of the policy set.

Policy Logic Depends on Reliable Signals

CAP logic can use information from several Microsoft services. Device compliance, for example, may depend on Microsoft Intune. Risk-based decisions may require other identity capabilities and licensing.

Before relying on a signal, confirm that the underlying service is licensed, configured, and producing trustworthy data. A policy may look complete while depending on information the tenant cannot provide. You also need an owner for the service and a process for reviewing changes that affect the policy logic.

Broader Scope Requires Careful Testing

Broad policy scope can reduce uncovered access paths, but broad does not mean indiscriminate. You should begin with the users, applications, and access scenarios the control is meant to govern, then test exclusions and dependencies before enforcement.

A common logic gap appears when an MFA policy does not include every user who should be covered. You may believe MFA is universal while a subset of accounts can still sign in without it. Similar gaps can appear around legacy authentication, service accounts, administrative roles, applications, or locations.

Report-only mode can show how a proposed CAP would evaluate real sign-ins without blocking them. That gives your team a chance to find unexpected outcomes, confirm business dependencies, and correct the policy before it affects operations.

Use Compensating Controls for Necessary Gaps

Some exclusions are necessary for business continuity or technical reasons. When a policy cannot cover a scenario directly, you should add a compensating control that addresses the remaining risk.

That may mean tighter monitoring, restricted privileges, stronger credential protection, a separate access path, or an alert tied to use of the excluded account. The control should be documented and tested. An exclusion with no follow-up becomes a gap that is easy to forget.

As the policy set grows, it becomes harder to understand at a glance. Complexity is sometimes necessary, but it carries maintenance work. Clear names, current documentation, defined ownership, and recurring reviews help you see how the policies interact and where a change in one rule may affect another.

Build a Layered Identity Security Program

Conditional Access and MFA belong inside a broader identity security program. Phishing training helps employees recognize attempts to steal credentials or session tokens. Reporting and alerts provide visibility into configuration changes and suspicious sign-ins. Regular review confirms that policy coverage still matches your users, applications, devices, and risk.

Navanta’s Microsoft 365 Management service gives you banking-focused support for that work. The service can add capacity around configuration, identity, access, monitoring, and ongoing administration while you keep authority over your risk decisions and user access.