

How to join multiple accounts?
If you already have a user profile, there's no need to create a new one - you can simply join other accounts using your existing credentials. This allows a single user profile to be linked to multiple Retail Media accounts.
To join a new account, an admin from that account must send you an invitation. They can do this by following the steps outlined in the Add a New User article.
If you are already an existing user, you can join any other account directly without creating a new user profile, which means one user can be part of multiple accounts.
To join a new account, the admin of that account should send you an invitation to join by following the steps here Add a New User.
To accept the invitation:
Open the Invitation Email.
Subject: "You have been invited to join [Account Name]"
From:
advertising@criteo.com
Click the Join account button.
Log in to your account.
If not already logged in, you will be asked to log in.
Use the same email address where you received the invitation.
Enter your password.
Access the New Account.
After logging in, the new account will be added to your portfolio.
You can choose the accounts you want to access from your dashboard.