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External Guest User Blocked from Accessing SharePoint Folder Due to Sign-In Risk

Ben 0 Reputation points
2026-01-14T22:17:28.12+00:00

An external (guest) user is attempting to access a shared SharePoint folder but receives the error shown in the screenshot. Which tenant is responsible for clearing the sign-in risk on the user account the hosting tenant (my tenant) or the guest user’s home tenant?

The error message in the screenshot indicates that the guest user’s home tenant is responsible for resolving the issue, but the guest user tenant admin claims that the problem is on my side.

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  1. Viego An 8,990 Reputation points Microsoft External Staff Moderator
    2026-01-15T00:32:32.5366667+00:00

    Dear @Ben,

    Thank you for reaching out to the Microsoft Q&A forum. I’m happy to assist you.

    To ensure the user can successfully access your tenant, I recommend that the IT administrators from both tenants review any risk activities or risky user alerts. Please follow these steps:

    1. Sign in to Microsoft Entra ID.
    2. Navigate to Users > All Users, then locate and select the affected user.
    3. Choose Dismiss user risk. User's image

    Alternatively:

    1. Sign in to Microsoft Entra ID as a Security Operator.
    2. Go to ID Protection > Risky users.
    3. Select the relevant risk activity and choose Dismiss user risk. User's image

    From the guest user’s home tenant:

    The IT administrator can:

    1. Generate a temporary password for the user.
    2. Require the user to reset their password.
    3. Ensure completion of MFA/2FA.

    For detailed instructions, please refer to the official documentation here: Remediate risks and unblock users

    I hope this information is helpful. If you need any further assistance, please feel free to reach out. We are here to help. Thank you very much for your understanding and cooperation.

    If you found the answer useful, please click "Accepted Answer" and kindly give it an upvote.

    If you have any follow-up questions, feel free to click "Comment" to continue the discussion.

    Note: To receive email notifications related to this thread, please follow the steps in our documentation to enable email alerts.

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