The core of this question is how do I join Marketing Cloud Contacts created by the Marketing Cloud MobilePush SDK with my Contacts in Sales Cloud within a Journey.
The MobilePush SDK is registering new Devices as a new Marketing Cloud Contact with the our App Login GUID as the Customer Key.
That GUID also exists on our Sales Cloud Contact records in a field called Contact_Key__c.
I created a Journey where the Entry Source is Salesforce Data. I have modified the Data Extension within the Audiance Builder so that under Data Extension the relationship is Contact_Key__c to Subscriber Key and under Data Designer so that the Marketing Cloud Contact Key is linked te Contact_Key__c.
However, when the Journey is running and I modify the Salesforce record to trigger the journey, the contact is always being injected into the journey with the Sales Cloud Contact ID as the Contact Key.
As a result, the Journy isn't correctly identifying the devices that belong to the Contact and isn't sending out Push Notifications. But if the Journey was correctly linking the Contact_Key__c field on the Sales Contact to the Marketing Cloud Contact Key then it would find the devices.
Is there a step I am missing in setting up my data?
Is Marketing Cloud event capable of doing what I am asking?
Best Answer
Will be very interested in any other experiences on how to solve this issue. It does see a glaring issue with how the connector works as not every company has Salesforce as its single source with data often being fed from other systems using an externalID.
Currently we do the mapping between Salesforce ID and SFMC COntact key within SFMC using SQL jobs but this is not ideal as you cant get any data back in to CRM.