Yes, it is something not implemented yet in NS8. In the meanwhile, you can edit groups with the samba-tool command. For instance, run
runagent -m samba1 podman exec samba-dc samba-tool -h
As alternative use Windows RSAT tools to manage user and groups.
Be aware that nested groups may not function correctly for group copy delivery in Mail and public folder ACLs.
Card NethServer · GitHub