Hi,
As we are handling the migration from SharePoint 2013 to SharePoint Online, we have noticed that there is a special group called "Everyone except external users" been added automatically under members group which has contribute permission - AND THIS IS DANGEROUS especially for confidential data through this change anyone can access data who were not allowed for on-premises - I wonder why this group is added under members group ? why this group has a default permission level of Contribute ?
Please help !
Best Regards,
Dipti Chhatrapati