1. Drag the Account activity onto the Journey Builder canvas.
2. Click Configure.
3. Using the Create or Update option, follow steps 1–3 at Account. Journey Builder attempts to retrieve the Person Contact ID of the Account record and uses the mapper under Account Management to look up the field if it is not found in the Marketing Cloud.
4. Select an option to designate what should happen if more than one account match is found.Multiple matching accounts can be found when the Account record's external ID is not unique.
5. Select Assignment Rules to observe the active assignment rule.
6. Click Next.