How to fix: Microsoft SharePoint can't share folders or files to external users (also Anyone with the link option is disabled) > Blog-D without Nonsense
Configure External Sharing in SharePoint Online - Office 365 Reports
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How to share files and folders externally in SharePoint - SharePoint Maven
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SharePoint Online Best Practices: External Sharing, Metadata & More!
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How to share files and folders externally in SharePoint - SharePoint Maven
Ultimate guide to SharePoint / Teams / Microsoft 365 external sharing | ShareGate
Solved] Your organization's policies don't allow you to share with these users. Go to external sharing in the office 365 admin center to enable it. - EnjoySharePoint