External Sharing N/A

Hi Juan Carlos, group site collections should allow for external sharing if you have enabled it.  As you noted, the current default for group-connected sites is to allow for sharing with *existing* external users already in your org directory.  We have begun to roll out the updated default behavior that Sahil referenced, where we now add a check at group creation time, and if Office 365 Groups allow for guest members, then the group's site will allow external sharing.  If not, the setting will remain "allow sharing with existing external users in your org.".  We've currently rolled out the update to FR customers, and will expand to rest of production tenants over the next few weeks.

Are you not seeing this behavior?

Thanks,

Tejas