The daily time range during which automated backups are created if automated backups are enabled, as determined by the
            BackupRetentionPeriod. Changing this parameter does not result in an outage and the change is asynchronously applied as soon as
            possible. Constraints: 
- Must be in the format hh24:mi-hh24:mi
- Times should be Universal Time Coordinated (UTC)
- Must not conflict with the preferred maintenance window
- Must be at least 30 minutes
 Declaration Syntax
 Declaration Syntax| C# | 
public string PreferredBackupWindow { get; set; }