Yes. Even if the object does not have a lookup relationship with the Cloud Document object, the Cloud Document record will still be created successfully during both Real-Time migration and Existing File Migration.


Migrate Existing

Migrate Real-Time


PS: View Drag, Drop & Upload Files to Amazon S3, a Salesforce AppExchange app for moving files from Salesforce to Amazon S3: https://appexchange.salesforce.com/appxListingDetail?listingId=a0N3000000B5ZPqEAN