Forum Discussion
Unable to share SharePoint site with external users
The first screenshot you are showing is setting the ExternalUserAndGuestSharing ("anonymous guest links") setting, which is NOT allowed in the tenant, according to the settings shown in your SPO Admin center screenshot. Once you set the Tenant-level setting accordingly, you can change this.
Doesn't explain the actual issue you are having with sharing, but you haven't provided any error messages for that...
The first screenshot you are showing is setting the ExternalUserAndGuestSharing ("anonymous guest links") setting, which is NOT allowed in the tenant, according to the settings shown in your SPO Admin center screenshot. Once you set the Tenant-level setting accordingly, you can change this.
Doesn't explain the actual issue you are having with sharing, but you haven't provided any error messages for that...
My bad! When I changed to ExternalUserSharingOnly setting it all worked. I was under the impression that the ExternalUserAndGuestSharing is without anonymous links. It pays to read the documentation carefully! Thanks!