diff --git a/src/PatchOrchestrationApplication/NodeAgentNTService/src/Manager/ServiceSettings.cs b/src/PatchOrchestrationApplication/NodeAgentNTService/src/Manager/ServiceSettings.cs
index 156defd..eebe3e5 100644
--- a/src/PatchOrchestrationApplication/NodeAgentNTService/src/Manager/ServiceSettings.cs
+++ b/src/PatchOrchestrationApplication/NodeAgentNTService/src/Manager/ServiceSettings.cs
@@ -14,7 +14,8 @@ enum Frequency
         Daily = 2,
         Weekly = 3,
         Monthly = 4,
-        Hourly = 5        
+        Hourly = 5,
+        MonthlyByWeekAndDay = 6
     }
 
     /// <summary>
@@ -80,10 +81,11 @@ class ServiceSettings
         /// The frequency for installing Windows Update.
         /// The format and Possible Values : 
         /// 1. Monthly,5,12:22:32
-        /// 2. Weekly,Tuesday,12:22:32
-        /// 3. Daily,12:22:32 
-        /// 4. Once,12-12-2017,12:22:32
-        /// 5. None
+        /// 2. MonthlyByWeekAndDay,2,Friday,21:00:00
+        /// 3. Weekly,Tuesday,12:22:32
+        /// 4. Daily,12:22:32 
+        /// 5. Once,12-12-2017,12:22:32
+        /// 6. None
         /// </summary>   
         public string WUFrequency { get; set; }
 
@@ -99,6 +101,10 @@ class ServiceSettings
 
         public DayOfWeek DayOfWeek { get; private set; }
 
+        public int WeekOfMonth { get; private set; }
+
+        public TimeSpan Time { get; private set; }
+
         public DateTime Date { get; private set; }
 
         public bool IsLastDayOfMonth { get; private set; }
@@ -161,6 +167,22 @@ private void ParseWUFrequency()
                     }
                     break;
 
+                case Frequency.MonthlyByWeekAndDay:
+                    if (arr.Count() != 4)
+                    {
+                        throw new ArgumentException("Illegal WUFrequency Parameter : " + WUFrequency);
+                    }
+
+                    this.WeekOfMonth = (int)Convert.ChangeType(arr[1], typeof(int));
+                    this.DayOfWeek = (DayOfWeek)Enum.Parse(typeof(DayOfWeek), arr[2]);
+                    this.Time = TimeSpan.Parse(arr[3]);
+
+                    if (this.WeekOfMonth < 1 || this.WeekOfMonth > 4)
+                    {
+                        throw new ArgumentException("Illegal WUFrequency Parameter : " + WUFrequency + ". The WeekOfMonth should be between 1 to 4.");
+                    }
+                    break;
+
                 case Frequency.Weekly:
                     if (arr.Count() != 3)
                     {
diff --git a/src/PatchOrchestrationApplication/NodeAgentNTService/src/Manager/TimerManager.cs b/src/PatchOrchestrationApplication/NodeAgentNTService/src/Manager/TimerManager.cs
index 269b24f..98b2152 100644
--- a/src/PatchOrchestrationApplication/NodeAgentNTService/src/Manager/TimerManager.cs
+++ b/src/PatchOrchestrationApplication/NodeAgentNTService/src/Manager/TimerManager.cs
@@ -638,6 +638,18 @@ private DateTime GetNextSchedulingTime()
                     return next;
                 }
 
+                case Frequency.MonthlyByWeekAndDay:
+                    {
+                        var next = this.GetNextDateTimeForMonthlyByWeekAndDayFrequency(currentTime, settings);
+                        
+                        if (DateTime.Compare(next, currentTime) < 0)
+                        {
+                            next = this.GetNextDateTimeForMonthlyByWeekAndDayFrequency(currentTime.AddMonths(1), settings);
+                        }
+
+                        return next;
+                    }
+
                 case Frequency.Weekly:
                     {
                         DateTime next = new DateTime(currentTime.Year, currentTime.Month, currentTime.Day, settingsDateTime.Hour, settingsDateTime.Minute, settingsDateTime.Second);
@@ -684,6 +696,17 @@ private DateTime GetNextSchedulingTime()
             }
         }
 
+        private DateTime GetNextDateTimeForMonthlyByWeekAndDayFrequency(DateTime currentTime, ServiceSettings settings)
+        {
+            var firstDayOfMonth = new DateTime(currentTime.Year, currentTime.Month, day: 1);
+            var firstWeekOfMonth = firstDayOfMonth.AddDays((settings.DayOfWeek + 7 - firstDayOfMonth.DayOfWeek) % 7);
+            var daysToAdd = 7 * (settings.WeekOfMonth - 1);
+            var dayOfMonth = firstWeekOfMonth.AddDays(daysToAdd);
+            var dayOfMonthWithTime = dayOfMonth + settings.Time;
+
+            return dayOfMonthWithTime;
+        }
+
         class CheckpointFileData
         {
             public DateTime schedulingDateTime = default(DateTime);