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SharePoint
A group of Microsoft Products and technologies used for sharing and managing content, knowledge, and applications.
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Hi @frob
You could enable 2FA for external collaborators on SharePoint Online and OneDrive by the steps as the following article:
https://www.cloudfronts.com/multi-factor-authentication-external-users-sharepoint-online/
For more information, you could refer to:
https://learn.microsoft.com/en-us/microsoft-365/admin/security-and-compliance/multi-factor-authentication-microsoft-365?view=o365-worldwide
https://learn.microsoft.com/en-us/microsoft-365/admin/security-and-compliance/set-up-multi-factor-authentication?view=o365-worldwide
Note: Microsoft is providing this information as a convenience to you. The sites are not controlled by Microsoft. Microsoft cannot make any representations regarding the quality, safety, or suitability of any software or information found there. Please make sure that you completely understand the risk before retrieving any suggestions from the above link.
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