Permission & Access Issues

How to Allow External Sharing for One SharePoint Site

Algirdas Jasaitis Sep 28, 2026 868 views

Question details

The user needs to configure SharePoint settings to allow external guest access to a single specific site without opening up external sharing for the entire organization.

How to Allow External Sharing for a Single SharePoint Site

Product: Microsoft SharePoint
Device & OS: not provided
Scenario: An organization wants to collaborate with external users on one specific project or site but maintain strict internal-only access for all other sites.
Observed behavior: By default, organization-level external sharing settings apply broadly, requiring a specific configuration to balance organization-wide security restrictions with site-specific external collaboration requirements.

Before you start

You must have SharePoint Administrator or Global Administrator privileges in your Microsoft 365 tenant to modify organization and site-level sharing settings.

Solution 1Recommended

Configure Organization and Site-Level External Sharing

Set the organization-wide external sharing setting to allow guests, then restrict all individual sites except the one you want to share.

A SharePoint site's external sharing setting cannot be more permissive than the organization-level setting. Therefore, you must first enable external sharing globally, and then restrict individual sites as needed.

Enable Global Sharing

Go to the SharePoint admin center, expand the 'Policies' menu, and click 'Sharing'. Set the organization-level external sharing to 'New and existing guests' or 'Anyone' based on your security requirements, and click Save.

Restrict Other Sites

Navigate to 'Sites' > 'Active sites' in the SharePoint admin center. Select all sites that should remain internal, click 'Sharing' on the command bar, and set their external sharing permissions to 'Only people in your organization'.

Enable Sharing for the Target Site

Select the specific site you want to share externally, click 'Sharing', and configure it to allow guests (matching the organization-level permission you just set).

Add External Users

Add the external users as guest users in Microsoft Entra ID (formerly Azure AD), then assign them the required site permissions within your target SharePoint site.

Configure Organization and Site-Level External Sharing

Microsoft Entra ID Settings: Ensure that your Microsoft Entra ID B2B collaboration settings are also configured to permit the addition of external guests.

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Frequently Asked Questions

Why is the external sharing option grayed out for my SharePoint site?

The site-level sharing setting cannot be more permissive than the organization-level setting. If the organization setting is restricted to 'Only people in your organization', you cannot enable external sharing for an individual site.

Can I share a specific folder externally instead of the whole site?

Yes. Once external sharing is enabled for the site, you can manage access for a specific document library or folder and share it directly with external guests without granting them access to the entire site.

Do external users need a Microsoft account to access the shared SharePoint site?

External users can access the site using a Microsoft account, a work or school account, or via a one-time passcode sent to their email, depending on how your organization's sharing and Entra ID settings are configured.

Document & File Issues