Due to Zoho API limitations, we can export/import only a certain amount of records per day. During a data migration, you may receive a "Crossing license limit" message, which means that the limit was exceeded. We will automatically resume your migration when the API is refreshed until all records are migrated.
As far as we know it's impossible to bypass the Zoho API restrictions at the moment. You can try to contact Zoho support or express your wish to increase the limits on their official forum.