MFA Security Issues

How to Fix Repeated Authentication Prompts After MFA Policy Changes

Maira Mehtab Sep 27, 2026 869 views

Question details

Users need to resolve an issue where the system continuously asks for authentication after updating MFA policies or applying new account licenses.

Product: Microsoft 365
Device & OS: not provided
Scenario: Administrators or users are managing Microsoft 365 accounts, adjusting Conditional Access policies, or assigning new user licenses.
Observed behavior: The system repeatedly prompts users to sign in and authenticate via MFA, failing to maintain an active session.

Before you start

Ensure you have Global Administrator credentials for the Microsoft 365 admin center, as troubleshooting multifactor authentication and Conditional Access policies requires elevated tenant permissions.

Solution 1Recommended

Review MFA and Conditional Access Policies

Check for conflicting security policies or overly strict session lifetime settings that might force users to continuously re-authenticate.

Repeated prompts are often caused by aggressive sign-in frequency settings or conflicts between newly applied licenses and existing Conditional Access rules. Adjusting session timeouts can stabilize the authentication flow.

Access the Admin Center

Navigate to Conditional Access

Go to 'Protection' in the left sidebar, then click on 'Conditional Access' to view all active security policies.

Review Session Controls

Select the relevant policies and check the 'Session' controls. Ensure the 'Sign-in frequency' is not set to an unnecessarily short timeframe (e.g., every 1 hour).

Verify License Assignments

Confirm that the affected users have the correct licenses applied and that there are no conflicting authentication requirements tied to those licenses.

Solution 2

Open a Microsoft 365 Service Request

If reviewing policies does not stop the repeated prompts, escalate the issue to Microsoft Support for backend diagnostics.

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Frequently Asked Questions

Why does Microsoft 365 keep asking me to authenticate?

This usually happens due to strict Conditional Access policies, shortened session timeouts, or backend conflicts after assigning new licenses that enforce different security requirements.

Can standard users fix the repeated MFA prompts?

No. Standard users cannot change tenant-level security settings. A Microsoft 365 Global Administrator must log in to the admin center to adjust session lifetimes and Conditional Access policies.

How do administrators check the sign-in frequency setting?

Administrators can check this by logging into the Microsoft Entra admin center, navigating to Protection > Conditional Access, selecting the active policy, and reviewing the Session controls.

What if adjusting Conditional Access policies doesn't work?

If the issue persists despite policy adjustments, the Global Administrator should open a support ticket via the Microsoft 365 admin center for a remote troubleshooting session with Microsoft support.

Microsoft Office Security Issues