You can find this section in HostBill Admin Area → Settings → General settings → Domain Settings → Synchronization.
This option allows to you enable automatic domain synchronization.
This option lets you choose the modules, for which automatic synchronization will be performed. When the list is empty, synchronization will be performed for all modules.
List of domain statuses, for which synchronization will be performed. When the field is empty the default value will be used (Default: Active).
Here you can choose the synchronization to be performed:
Choose how many days before the domain expires. When the field is empty, the default value will be used (Default: 90)
Limit of synchronizations run in a single cron task. When the field is empty, the default value will be used (Default: 10).
Minimum synchronization interval for a single domain.
This option allows to set a number of failed domain synchronization attempts after which the domain will be considered as Transferred out.