Hi... Im not sure I understand. Ive been working with odoo(open era) since version 6 and there has always been errors and issues with multi-company.. Now we are on version 14. Has anyone had a successful implementation of multi-company. I have had somewhat problem free implementations up to 6 child companies under a parent but when I go to 7 I started getting errors and conflict.  I would love top hear from someone how they were able o configure and implement a problem free implementation of many child companies. I have clients wanting to connect 100s of companies under a parent but I am afraid.. Any help is much appreciated!

Hello,

Jose_M when you say:

... for example the one in res.partner allow you to see your parents partner but not let you read them, so you need to change it in order to fix this.

The rule that you seem to be referring to is a global record access rule:

 {
 'name’: 'res_partner: portal/public: read access on my commercial partner’,
 'model_id’: [79, 'Partner’],
 'domain_force’: "[('id’, 'child_of’, user.commercial_partner_id.id)]",
 'perm_create’: False,
 'perm_read’: True,
 'perm_unlink’: False,
 'perm_write’: False}
 'active’: True, 
}

It seems to be logical than a commercial partner can leave you a contact, but such external user is supposed not to access to your other contacts.

This error can also happen when an internal user belongs to the Portal and Public groups.

The contact access seems to be granted to internal users only.