Yes, Quick Fields is the same, it needs to be installed on premises. You can still do lookups against external databases like you always did. The only thing that is different when connecting to a Cloud repository is that in the document class and Capture Engine settings, both the server and the repository are set as the (same) r-000ab000.laserfiche.com (where r-000ab000 is the repository ID which can be found on the Plan tab in the customer's account page in the Cloud) and the "use SSL" box needs to be checked.