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How to set external sharing on site collections?
Calls GetInputSharing, which prompts the user to choose an external sharing setting ( SharingCapabilities) to apply to the site collection. The external sharing settings choices include: Disabled, which turns off external sharing on the site. ExternalUserAndGuestSharing, which enables external user and guest sharing on the site.
For example, if external sharing is turned on for the entire SharePoint environment, but it is limited to allowing only authenticated users, then that will be the only kind of external sharing you can allow in a specific site collection.
What happens when external sharing is turned off?
Anonymous guest links could potentially be forwarded or shared with other people, who might also be able to view or edit the content without signing in. If external sharing is turned off for the entire SharePoint environment, you will not be able to turn it on for specific site collections.
How does external sharing work on a website?
Site owners or others with full control permissions can also share documents externally opt to require sign-in, or send an anonymous guest link for documents. When users share a document, they can grant external users either view or edit permissions to the document.
1. Go to Office 365 Admin portal. 2. In the left side navigation, expand Admin and click SharePoint to connect the SharePoint online admin center. 3. Click site collections, and check the box next to site collection that you want enable external sharing. 4. In the ribbon, click Sharing action.
Allow site users to share sites with people who sign in as authenticated users, but you also want to allow site users to share documents through the use of anonymous guest links, which do not require invited recipients to sign in. Site owners or others with full control permissions can share sites with external users.