Thank you for your help!
I will better describe my needs.
Our business middleware send Customer orders (customer informations and contacts included) to D365 when an order is taken on our front website. D365 is used to invoice every orders.
When I receive email from our DPO, I go on "All Sales orders".

I search by the customer mail and get corresponding orders with that email.

I click on first order and go on header.
I replace Email and Telephone information by "RGPD" and I click on the contact field to access the customer.

Then, I change First name, Last name and Search name field and Contact informations.


I have to do this for all orders (except that I do Contact changement once as it's linked with all orders).
If you need more informations, please tell me.