Access denied on SharePoint for external guest users

Question

Hello 

Please i need your help on this issue.

We invited a guest in our tenant and provided access on a SharePoint folder in a document library.

The user was added to a SharePoint group on a document library and we shared a specific folder with that user by sending a SharePoint invitation.

When the user clicks on the SharePoint invitation, they can log in successfully, but the user gets an access denied message.

Please note that we provided external access to multiple people from that specific client in the same manner. The rest can successfully access the specific folder, but one of the user gets an access denied message.

 

As troubleshooting steps we did the following: 

• removed the user from user profile service on the SharePoint admin center
• removed the user from the site collection
• deleted and re-created the user in Azure AD
• invited the user again in the same manner we invited the others
• and we also had a Teams call with the client and assisted the user via share screen, making sure the user is following the correct steps for logging in

 

After all these troubleshooting steps, the user keeps getting an "access denied" message while the others have access.

 

Could you please assist us with this issue?

Answer 1

How did you remove the user from the site?

Most likely ID Mismatch issue: https://learn.microsoft.com/en-us/sharepoint/troubleshoot/sharing-and-permissions/fix-site-user-id-mismatch

Answer 2

You could follow below tips to troubleshoot the issue.

1.As Alvaro Avila's answer, check ID mismatch issue.

2.As you mentioned, you shared the folder with external user through direct access, I suggest you share the folder with sharing link, then check whether the issue persists.

3.Let the user clear the browser or in the incognito mode to open the folder.

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