The Payments tab allows you to enable/disable the automatic payment sync.
Automatic Payment Sync: If enabled, payments collected in QuickBooks Online will be automatically synced to Manage on a daily basis. If an error occurs during payment sync the payment will need to be fixed, then the sync will need to be rerun manually for the date range of the failed payment. If Automatic Payment Sync is enabled, an error email will be sent out notifying of the failure and will include a link that will rerun the payment sync. If disabled, you will need to manually run the payment sync if you wish to import payments from QuickBooks Online to Manage.
See the following article on important information on how Gozynta Mobius handles Payments and Credit Memos.