I am looking to clean up the contacts in Contact Builder.
There are many records (about 5x the amount) than I am actually using in my Marketing Cloud Email Studio instance (All Subscribers).
We currently do not have marketing cloud connected to any external sources or a CRM.
There doesn't seem to be an "Export All" or way to create a list of all the Contacts in Contact Builder. Best practice delete instructions say to use MobilePush or Mobile studio to create a filtered list...but we don't have that module.
My plan is to export all contacts from Contact Builder, identify contacts that are not in use by any channel, don't have email addresses associated with them, and have been inactive for longer than 3 years and remove them. (Yes, I am sure I want to do this and am aware of the implications of doing so.) We are being charged for having too many contacts in Contact Builder and I need to remove an estimated 3 million records.
Is there anyway to extract all contacts from Contact Builder with the fields seen in the tool so I can make a Data Extension or list manually for removal?