Hello,
I am using Odoo 14 Community Edition.
Can someone show me, please
where I can find the Administration / Settings to add groups = "base.group_system"?
Many Thanks

Earlier, I had tried to do it myself, but that was too technical and time-consuming for me. 

But after some research, I found this module on Odoo app store. Here is the link

https://apps.odoo.com/apps/modules/16.0/restrict_access_right_user

Hope it helps.

I don't think it is possible (as standard).

You are right that once you grant a user access to Administration (either of the two user access groups) you are giving them the ability to manage both Settings and User Access.

In a typical Odoo implementation this is probably OK, because you wouldn't have two separate people needing access to settings and user access.  Do you have a requirement to set it up that way?

The method proposed from Paresh worked nice, thanks!

I also needed a couple of additional steps, because after this the user with "Access Rights" group is still able to clone/edit an user with "Settings" group, so:

• added a record rule for the group "Access rights" to prevent edit all the users except administrator.

• added a record rule for the group "Settings" to give the possibility to edit user adminstrator.