diff --git a/src/ManagedServices/ManagedServices/ChangeLog.md b/src/ManagedServices/ManagedServices/ChangeLog.md
index 70a893f43094..e2638c8b2e0e 100644
--- a/src/ManagedServices/ManagedServices/ChangeLog.md
+++ b/src/ManagedServices/ManagedServices/ChangeLog.md
@@ -18,6 +18,7 @@
         - Additional information about change #1
 -->
 ## Upcoming Release
+* Updated breaking change warnings on cmdlets of managed services assignment and definition
 
 ## Version 1.1.0
 * Added breaking change warnings on cmdlets of managed services assignment and definition
diff --git a/src/ManagedServices/ManagedServices/Commands/NewAzureRmManagedServicesAssignment.cs b/src/ManagedServices/ManagedServices/Commands/NewAzureRmManagedServicesAssignment.cs
index a938c1153768..1792bf257a41 100644
--- a/src/ManagedServices/ManagedServices/Commands/NewAzureRmManagedServicesAssignment.cs
+++ b/src/ManagedServices/ManagedServices/Commands/NewAzureRmManagedServicesAssignment.cs
@@ -42,6 +42,11 @@ public class NewAzureRmManagedServicesAssignment : ManagedServicesCmdletBase
         [ScopeCompleter]
         public string Scope { get; set; }
 
+        [CmdletParameterBreakingChange(
+            nameOfParameterChanging: "RegistrationDefinitionName",
+            deprecateByVersion: ManagedServicesUtility.UpcomingVersion,
+            changeInEfectByDate: ManagedServicesUtility.UpcomingVersionReleaseDate,
+            ChangeDescription = ManagedServicesUtility.DeprecatedParameterDescription)]
         [Parameter(ParameterSetName = DefaultParameterSet, Mandatory = true, HelpMessage = "The registration definition identifier.")]
         [ValidateNotNullOrEmpty]
         public string RegistrationDefinitionName { get; set; }
@@ -50,7 +55,7 @@ public class NewAzureRmManagedServicesAssignment : ManagedServicesCmdletBase
             nameOfParameterChanging: "RegistrationDefinitionResourceId",
             deprecateByVersion: ManagedServicesUtility.UpcomingVersion,
             changeInEfectByDate: ManagedServicesUtility.UpcomingVersionReleaseDate,
-            ChangeDescription = ManagedServicesUtility.DeprecatedParameterDescription)]
+            ReplaceMentCmdletParameterName = "RegistrationDefinitionId")]
         [Parameter(ParameterSetName = ByResourceIdParameterSet, ValueFromPipelineByPropertyName = true, Mandatory = true, HelpMessage = "The fully qualified resource id of the registration definition.")]
         [ValidateNotNullOrEmpty]
         [Alias("ResourceId")]
diff --git a/src/ManagedServices/ManagedServices/Commands/NewAzureRmManagedServicesDefinition.cs b/src/ManagedServices/ManagedServices/Commands/NewAzureRmManagedServicesDefinition.cs
index a5da0a046708..4918cc6f8163 100644
--- a/src/ManagedServices/ManagedServices/Commands/NewAzureRmManagedServicesDefinition.cs
+++ b/src/ManagedServices/ManagedServices/Commands/NewAzureRmManagedServicesDefinition.cs
@@ -15,6 +15,7 @@
 using Microsoft.Azure.Management.ManagedServices.Models;
 using Microsoft.Azure.PowerShell.Cmdlets.ManagedServices.Extensions;
 using Microsoft.Azure.PowerShell.Cmdlets.ManagedServices.Models;
+using Microsoft.WindowsAzure.Commands.Common.CustomAttributes;
 using Microsoft.WindowsAzure.Commands.Utilities.Common;
 using System;
 using System.Collections.Generic;
@@ -23,10 +24,14 @@
 
 namespace Microsoft.Azure.PowerShell.Cmdlets.ManagedServices.Commands
 {
-    [WindowsAzure.Commands.Common.CustomAttributes.GenericBreakingChange(
+    [GenericBreakingChange(
         message: "New mandatory parameter 'DisplayName' will be added to represent a user-friendly name for a registration definition",
         deprecateByVersion: ManagedServicesUtility.UpcomingVersion,
         changeInEfectByDate: ManagedServicesUtility.UpcomingVersionReleaseDate)]
+    [GenericBreakingChange(
+        message: "New mandatory parameter 'Authorization' will be added to represent a list containing principal IDs and role definition IDs.",
+        deprecateByVersion: ManagedServicesUtility.UpcomingVersion,
+        changeInEfectByDate: ManagedServicesUtility.UpcomingVersionReleaseDate)]
     [Cmdlet(
     VerbsCommon.New,
     Microsoft.Azure.Commands.ResourceManager.Common.AzureRMConstants.AzureRMPrefix + "ManagedServicesDefinition",
diff --git a/src/ManagedServices/ManagedServices/Extensions/ManagedServicesUtility.cs b/src/ManagedServices/ManagedServices/Extensions/ManagedServicesUtility.cs
index b120094a86b3..c524a7e05e75 100644
--- a/src/ManagedServices/ManagedServices/Extensions/ManagedServicesUtility.cs
+++ b/src/ManagedServices/ManagedServices/Extensions/ManagedServicesUtility.cs
@@ -22,7 +22,7 @@ namespace Microsoft.Azure.PowerShell.Cmdlets.ManagedServices.Extensions
     public static class ManagedServicesUtility
     {
         // TODO: Remove these three string as well as breaking changes attributes for Oct. 27th change
-        public const string UpcomingVersion = "1.0.3";
+        public const string UpcomingVersion = "1.3.0";
         public const string UpcomingVersionReleaseDate = "10/27/2020";
         public const string DeprecatedParameterDescription = "Parameter is being deprecated without being replaced";