You can easily migrate your database using the import data from RavenDB operation.
In order to do so, the source server needs to have the destination server's cluster certificate.
Open the Management Studio of each server.
Each server's Studio is available at it Portal's
In each studio, click Manage certificates.
Export the destination server's Cluster certificate.
Import the certificate as a Client Certificate by the source server.
Configure the Client Certificate's Database Permissions to include the database whose data you want to migrate.
In the Destination Server, create or select an empty database and open its Settings --> Import Data option.
Enter the URL of the source server.
Choose which data to migrate, and click Migrate Database.