1. Connect AccountsConnect your Marketing Cloud account to the corresponding Sales or Service Cloud org at the account level to continue Marketing Cloud Connect setup.
2. Create Marketing Cloud API UserCreate the Marketing Cloud API user, typically a unique user, that connects to the Salesforce system user in Marketing Cloud Connect setup.
3. Connect Marketing Cloud API UserConnect the Marketing Cloud API user to the Salesforce system user to enable core system communication activities in Marketing Cloud Connect. These activities include pushing tracking data from the Marketing Cloud into your Sales or Service Clouds.
4. Assign Business UnitsFor Marketing Cloud Enterprise 2.0 accounts, assign applicable business units to the Marketing Cloud API user. The Marketing Cloud Connect API user’s business unit access in Marketing Cloud determines which business units are available for use within Sales or Service Cloud.