Forum Discussion
Solved
External Sharing Difficulties (SharePoint)
I have an external sharing site collection set up with several sub-sites. My understanding is this 1. Anyone can create a Microsoft Account off any non-O365 email and then they can be authenticated ...
Hi Eric Adler,
Do you have the "require recipients to authenticate with the same account that was invited"? If not, then you don't need to create an MSA with the same e-mail address as the account that was invited (gmail). Also, with the new external sharing flow that is rolling out, users who do not have an account will no longer be required to create an account. Instead they can authenticate via a one time code. Hope that helps!
Stephen Rice
OneDrive Program Manager II
If the person you are external sharing with has an O365 work account, and their system is a hybrid or entirely on-premises system that uses ADFS, but their ADFS is turned off or (more likely) ADFS-proxy is not configured properly, your system will not be able to authenticate the external user. See https://msdn.microsoft.com/en-us/library/bb897402.aspx and https://serverfault.com/questions/708669/what-is-adfs-active-directory-federation-services