Hi Samir,
Appreciate your advice,
I tried. However, it did not allow, it shows:
"Incompatible companies on records:
- 'Sale person' belongs to company 'NN' and 'Sales Team' (crm_team_id: 'Sarah') belongs to another company (AUS)."
To fix the issue above, I should change the salesperson to AUS. However, they are in NN and working under contract NN. Just make
quotes and contact to the customer in AUS,
What do you think?

Hi Franz
Switch the sales users to the other company , you can generte Quotations

i Have another Idea by using Odoo Studio create a new Field for that Sales Team and call that field Outsourcing Members for Example

Hi Samir,
Thanks for your advice,
It doesn't work; even I set user-accessible two companies,
They do not allow and employees in company A to send quotes on company B
And I can't set employee A to company B because all relevant payroll belongs to A.
Also, the idea with Odoo Studio to create a new Field meet a similar issue as above.
Regards
Franz