There is a command group 'az_sql_server arc_backups policy'. This group of commands could 'manage backups policy'. The group of commands has global parameter '--debug' which means 'Increase logging verbosity to show all debug logs.'. The group of commands has global parameter '--help -h' which means 'Show this help message and exit.'. The group of commands has global parameter '--only-show-errors' which means 'Only show errors, suppressing warnings.'. The group of commands has global parameter '--output -o' which means 'Output format.'. The group of commands has global parameter '--query' which means 'JMESPath query string. See <a href="http://jmespath.org/">http://jmespath.org/</a> for more information and examples.'. The group of commands has global parameter '--subscription' which means 'Name or ID of subscription. You can configure the default subscription using `az account set -s NAME_OR_ID`.'. The group of commands has global parameter '--verbose' which means 'Increase logging verbosity. Use --debug for full debug logs.'. This group contains a child command 'az_sql_server arc_backups policy_set'.The syntax is: az sql server-arc backups-policy set --name
                                     --resource-group
                                     [--default-policy]
                                     [--diff-backup-hours]
                                     [--full-backup-days]
                                     [--retention-days]
                                     [--tlog-backup-mins]. The 1th example of the child command would be to use it to 'ex 1   enabling a backups policy with a custom backups policy', the syntax is: az sql server-arc backups-policy set --name myServerName --resource-group myResourceGroup --retention-days 7 --full-backup-days 7 --diff-backup-hours 12 --tlog-backup-mins 5. The 2th example of the child command would be to use it to 'ex 2   enabling a backups policy with the default backups policy', the syntax is: az sql server-arc backups-policy set --name myServerName --resource-group myResourceGroup --default-policy. The 3th example of the child command would be to use it to 'ex 3   disabling a backups policy', the syntax is: az sql server-arc backups-policy set --name myServerName --resource-group myResourceGroup --retention-days 0. The parameter '--name -n' is required. It is used to name of the arc-enabled sql server instance.. The parameter '--resource-group -g' is required. It is used to name of the resource group where the arc-enabled sql server instance is located.. The parameter '--default-policy' is optional. set the default policy of weekly retention period, weekly full, daily differential, and 5 min transaction log backups.. The parameter '--diff-backup-hours' is optional. interval, in hours, at which differential backups should be performed. valid values – 12 or 24.. The parameter '--full-backup-days' is optional. interval, in days, at which a new full backup should be performed. valid values – 0-7.. The parameter '--retention-days' is optional. number of days to keep the backups for. valid values 0-35.. The parameter '--tlog-backup-mins' is optional. interval, in minutes, at which transactional backups should be performed. valid values – 0 to 60.. 