Permission & Access Issues

How to Fix SharePoint Invitation Signed-In Account Not Authorized Error

Algirdas Jasaitis Oct 13, 2026 869 views

Question details

The user receives a SharePoint invitation but encounters an 'access denied' error stating the signed-in account is not authorized, despite using the correct email address.

How to Fix SharePoint Invitation Signed-In Account Not Authorized Error

Product: Microsoft SharePoint
Device & OS: not provided
Scenario: Attempting to open a shared SharePoint site or folder via an email invitation link.
Observed behavior: Access is denied with a message indicating the signed-in account is not listed as an authorized user, even though shared OneDrive folders from the same sender open correctly.

Before you start

Verify the exact email address where you received the SharePoint invitation and close all active browser tabs to ensure cached login sessions do not interfere with the authentication process.

Solution 1Recommended

Sign Out of Conflicting Microsoft Accounts

Browsers often automatically sign you in with a cached Microsoft account, which may not match the specific email address authorized for the SharePoint invitation.

SharePoint relies on strict identity verification. If your browser is logged into a personal Microsoft account or a different work account, SharePoint will reject the access attempt because the session ID does not match the invited email address.

Open an Incognito or Private Window

Launch your web browser and open a Private/Incognito window (e.g., press Ctrl+Shift+N in Google Chrome or Edge) to completely bypass saved login credentials.

Access Your Email Inbox

Within the private window, navigate to your email provider, log in using the exact email address that received the SharePoint invitation, and locate the email.

Click the Invitation Link

Click the shared link inside the invitation. When the Microsoft sign-in page appears, ensure you authenticate using the exact email address the invitation was sent to.

Sign Out of Conflicting Microsoft Accounts

Account Mismatch Resolved: Using a private browsing window is the most reliable way to force Microsoft to ask for the correct credentials instead of defaulting to a previously saved session.

Solution 2

Ask the Site Owner to Re-issue the Invitation

If the original sharing link is corrupted or tied to a failed authentication attempt, generating a fresh invitation can reset the access permissions.

Solution 3

Verify Organization External Sharing Settings

If you are an external user (guest), the host organization's IT policies might be blocking guest access at the administrative level.

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Frequently Asked Questions

Why does SharePoint say my account is not authorized even though the email is correct?

This usually happens when your web browser automatically signs you in with a different cached Microsoft account (such as a personal Outlook or Xbox account) instead of the exact email address that received the invitation.

How do I open a SharePoint link as a guest?

To open a SharePoint link as a guest, click the link in your email and follow the prompts to request a verification code. Enter the code sent to your email to verify your identity. Ensure you are not logged into a conflicting Microsoft account while doing this.

Can I access a shared SharePoint folder without a Microsoft account?

Yes, if the organization allows external sharing via 'verification codes'. You can access the files by receiving a one-time passcode to your email instead of creating a Microsoft account, provided the IT admin has enabled this feature.

Why can I access a shared OneDrive folder from the same sender but not SharePoint?

OneDrive and SharePoint can have different sharing policies configured by the IT administrator. External sharing might be permitted for an individual's OneDrive but strictly restricted or disabled for organizational SharePoint sites.

Document & File Issues