Hi,

To know the users having the portal access rights, what you do easily is that, activate the developer mode then go to Settings -> Users -> Groups, then search the group named 'Portal' .

Then open the group, there in the users tab, you can see all the users belonging to this group.

Thanks

I can not test it right now, but did you remove the "internal" filter in the user list and display also the inactive users? Then you may want to try to delete your portal users, if deletion is not possible, set them to inactive.