Account Locked & Blocked

How to Fix a Blocked Guest Account When Accessing a Shared SharePoint Site

Amos Gikunda Sep 28, 2026 868 views

Question details

The user is unable to access a SharePoint site shared by a third-party organization because their Microsoft guest account appears to be blocked in the host's tenant.

How to Fix a Blocked Guest Account When Accessing a Shared SharePoint Site

Product: SharePoint
Device & OS: not provided
Scenario: Attempting to access a SharePoint site that has been shared by an external Microsoft 365 organization.
Observed behavior: The system displays an error indicating that the user's Microsoft account is blocked, denying access to the shared external resources.

Before you start

Verify that your primary Microsoft account is active by logging into your own Microsoft portal. This confirms the issue is specifically tied to the external organization's guest permissions rather than your personal credentials.

Solution 1Recommended

Contact the Host Organization's Microsoft 365 Administrator

Since the block occurs in the third-party Microsoft 365 tenant, you must contact their IT administrator to unblock or reset your guest account access.

When you are invited to collaborate on an external SharePoint site, a shadow guest account is created in the host organization's Microsoft 365 tenant. If you lose access or receive a 'blocked' message, the issue resides within their tenant's directory restrictions, not your personal Microsoft account.

Identify the external administrator

Find the contact information for the IT support team or the Microsoft 365 administrator of the organization that originally shared the SharePoint site with you.

Request a guest account reset

Ask the administrator to navigate to their Microsoft Entra ID (formerly Azure AD) admin center, locate your guest account, and either remove the block or completely delete your guest profile from their directory.

Remove from SharePoint UserInfo list

Request that the admin specifically remove your user profile from the shared SharePoint site's UserInfo list. This clears any corrupted permission caches that might persist.

Receive a new invitation link

Once your previous guest profile is fully cleared from their system, ask the administrator to re-add you as a guest and send a fresh SharePoint site invitation link.

Contact the Host Organization's Microsoft 365 Administrator

Administrator Guidance: Host administrators can refer to the official Microsoft documentation on removing users from the UserInfo list to ensure the guest account is cleanly reset before re-inviting the user.

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Frequently Asked Questions

Why is my Microsoft account blocked only on the shared SharePoint site?

Your personal Microsoft account is likely fine. The 'blocked' error refers exclusively to the guest account created in the external organization's Microsoft 365 tenant, which manages your access to their specific SharePoint environment.

Can I fix a blocked SharePoint guest account by resetting my own password?

No. Resetting your personal Microsoft account password will not resolve this issue. The access block is enforced by the external organization's security policies, so only their IT administrator can lift it.

How long does it take for a reset guest account to regain SharePoint access?

Once the external IT administrator removes your old profile and re-invites you, it can take anywhere from a few minutes to 24 hours for the new permissions to fully sync across their SharePoint environment.

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