Suspicious Login Issues

How to Fix Suspicious Activity and Account Blocked Errors in Microsoft Entra B2B

Amos Gikunda Oct 19, 2026 868 views

Question details

A guest user is blocked from signing in to a partner organization's website due to Microsoft Entra risk policies flagging the account for suspicious activity.

Fix Suspicious Activity and Account Blocked Errors in Microsoft Entra B2B Sign-In

Product: Microsoft Entra ID
Device & OS: not provided
Scenario: Attempting to sign in to another organization's website as a B2B collaboration guest user.
Observed behavior: The sign-in fails with an account blocked error because the user's credentials have been flagged as potentially compromised by Microsoft Entra risk policies.

Before you start

Ensure you have access to your security verification methods for a self-service password reset, or have the contact information for your organization's IT administrator handy.

Solution 1Recommended

Reset Your User Password

Resetting your password is the quickest way to clear the compromised credentials flag and restore your ability to sign in as a guest.

When Microsoft detects that your password may have been exposed, it blocks your B2B access to protect the target organization. A successful password reset confirms your identity and secures the account.

Go to the Password Reset Portal

Navigate to the Microsoft Password Reset portal in your web browser and initiate the password-reset process.

Verify your identity

Follow the on-screen prompts to verify your identity using your configured security methods (such as phone, email, or authenticator app).

Create a new password

Set a new, strong password for your account. Once the reset is successful, try signing in to the partner organization's website again as a guest user.

Self-Service Reset Unavailable: If you receive a message that self-service password reset is not enabled for your account, you must contact your organization's IT administrator to reset it for you.

Solution 2

Dismiss User Risk in Microsoft Entra Admin Center

If a password reset does not resolve the block, an IT administrator can manually review and dismiss the risk flag on the user account.

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Frequently Asked Questions

Why am I blocked from signing into another organization as a guest?

Your account may have been flagged by Microsoft Entra risk policies if suspicious activity was detected, meaning your credentials might be compromised. The system blocks guest access to protect the partner organization's environment.

What should I do if self-service password reset is unavailable?

If your organization has not enabled self-service password reset (SSPR), you must contact your organization's IT administrator directly to have them reset your password and clear the compromised status.

How long does it take for my account to be unblocked after an admin dismisses the risk?

Once an administrator dismisses the user risk in the Microsoft Entra admin center, it may take several minutes for the changes to replicate and update your risk state across the Microsoft authentication system.

Microsoft Office Security Issues