Forum Discussion
External Sharing and Guests
So when looking at Groups this is controlled by the settings:
Office 365 Admin portal-> Settings -> Security and Privacy -> Sharing -> On/Off toggle
This gives you an on / off switch , for more details on this see this https://support.office.com/en-us/article/adding-guests-to-office-365-groups-bfc7a840-868f-4fd6-a390-f347bf51aff6.
You can also control this via the Azure Active Directory portal in a bit more of a granular way.
Azure Active Directory -> Users -> User Settings -> Manage External collaboration settings.
This gives you a bit more control, for all the details on this blade check out - https://docs.microsoft.com/en-us/azure/active-directory/b2b/delegate-invitations
There are also service specific settings on top of guest settings for external sharing:
So make sure you check OneDrive, Teams, PowerBI, Flow, Sway and Yammer admin portals.
Here are some additional links around external sharing for some Office365 services which have direct external sharing settings... (its not a complete list but should help with your discussions)
- https://docs.microsoft.com/en-us/onedrive/manage-sharing
- https://docs.microsoft.com/en-us/microsoftteams/manage-external-access
- https://docs.microsoft.com/en-us/Yammer/work-with-external-users/disable-external-messaging
- https://flow.microsoft.com/en-us/blog/introducing-data-loss-prevention/
- https://support.office.com/en-us/article/Administrator-settings-for-Sway-d298e79b-b6ab-44c6-9239-aa312f5784d4
- https://docs.microsoft.com/en-us/power-bi/service-admin-portal#export-and-sharing-settings