diff --git a/sdk/dns/Azure.ResourceManager.Dns/src/Generated/Models/CloudError.cs b/sdk/dns/Azure.ResourceManager.Dns/src/Generated/Models/CloudError.cs
index c7dc25f4dd8d..a5b82ed622f2 100644
--- a/sdk/dns/Azure.ResourceManager.Dns/src/Generated/Models/CloudError.cs
+++ b/sdk/dns/Azure.ResourceManager.Dns/src/Generated/Models/CloudError.cs
@@ -7,7 +7,7 @@
 
 namespace Azure.ResourceManager.Dns.Models
 {
-    /// <summary> An error message. </summary>
+    /// <summary> An error response from the service. </summary>
     internal partial class CloudError
     {
         /// <summary> Initializes a new instance of CloudError. </summary>
@@ -16,13 +16,13 @@ internal CloudError()
         }
 
         /// <summary> Initializes a new instance of CloudError. </summary>
-        /// <param name="error"> The error message body. </param>
+        /// <param name="error"> Cloud error body. </param>
         internal CloudError(CloudErrorBody error)
         {
             Error = error;
         }
 
-        /// <summary> The error message body. </summary>
+        /// <summary> Cloud error body. </summary>
         public CloudErrorBody Error { get; }
     }
 }
diff --git a/sdk/dns/Azure.ResourceManager.Dns/src/Generated/Models/CloudErrorBody.cs b/sdk/dns/Azure.ResourceManager.Dns/src/Generated/Models/CloudErrorBody.cs
index 4580456621e2..0fbde7204f0f 100644
--- a/sdk/dns/Azure.ResourceManager.Dns/src/Generated/Models/CloudErrorBody.cs
+++ b/sdk/dns/Azure.ResourceManager.Dns/src/Generated/Models/CloudErrorBody.cs
@@ -10,7 +10,7 @@
 
 namespace Azure.ResourceManager.Dns.Models
 {
-    /// <summary> The body of an error message. </summary>
+    /// <summary> An error response from the service. </summary>
     internal partial class CloudErrorBody
     {
         /// <summary> Initializes a new instance of CloudErrorBody. </summary>
@@ -20,10 +20,10 @@ internal CloudErrorBody()
         }
 
         /// <summary> Initializes a new instance of CloudErrorBody. </summary>
-        /// <param name="code"> The error code. </param>
-        /// <param name="message"> A description of what caused the error. </param>
-        /// <param name="target"> The target resource of the error message. </param>
-        /// <param name="details"> Extra error information. </param>
+        /// <param name="code"> An identifier for the error. Codes are invariant and are intended to be consumed programmatically. </param>
+        /// <param name="message"> A message describing the error, intended to be suitable for display in a user interface. </param>
+        /// <param name="target"> The target of the particular error. For example, the name of the property in error. </param>
+        /// <param name="details"> A list of additional details about the error. </param>
         internal CloudErrorBody(string code, string message, string target, IReadOnlyList<CloudErrorBody> details)
         {
             Code = code;
@@ -32,13 +32,13 @@ internal CloudErrorBody(string code, string message, string target, IReadOnlyLis
             Details = details;
         }
 
-        /// <summary> The error code. </summary>
+        /// <summary> An identifier for the error. Codes are invariant and are intended to be consumed programmatically. </summary>
         public string Code { get; }
-        /// <summary> A description of what caused the error. </summary>
+        /// <summary> A message describing the error, intended to be suitable for display in a user interface. </summary>
         public string Message { get; }
-        /// <summary> The target resource of the error message. </summary>
+        /// <summary> The target of the particular error. For example, the name of the property in error. </summary>
         public string Target { get; }
-        /// <summary> Extra error information. </summary>
+        /// <summary> A list of additional details about the error. </summary>
         public IReadOnlyList<CloudErrorBody> Details { get; }
     }
 }
diff --git a/sdk/dns/Azure.ResourceManager.Dns/src/Generated/Models/Zone.Serialization.cs b/sdk/dns/Azure.ResourceManager.Dns/src/Generated/Models/Zone.Serialization.cs
index 5f77f6622038..fc17c5fca092 100644
--- a/sdk/dns/Azure.ResourceManager.Dns/src/Generated/Models/Zone.Serialization.cs
+++ b/sdk/dns/Azure.ResourceManager.Dns/src/Generated/Models/Zone.Serialization.cs
@@ -74,6 +74,7 @@ internal static Zone DeserializeZone(JsonElement element)
             string location = default;
             Optional<IDictionary<string, string>> tags = default;
             Optional<long> maxNumberOfRecordSets = default;
+            Optional<long> maxNumberOfRecordsPerRecordSet = default;
             Optional<long> numberOfRecordSets = default;
             Optional<IReadOnlyList<string>> nameServers = default;
             Optional<ZoneType> zoneType = default;
@@ -140,6 +141,16 @@ internal static Zone DeserializeZone(JsonElement element)
                             maxNumberOfRecordSets = property0.Value.GetInt64();
                             continue;
                         }
+                        if (property0.NameEquals("maxNumberOfRecordsPerRecordSet"))
+                        {
+                            if (property0.Value.ValueKind == JsonValueKind.Null)
+                            {
+                                property0.ThrowNonNullablePropertyIsNull();
+                                continue;
+                            }
+                            maxNumberOfRecordsPerRecordSet = property0.Value.GetInt64();
+                            continue;
+                        }
                         if (property0.NameEquals("numberOfRecordSets"))
                         {
                             if (property0.Value.ValueKind == JsonValueKind.Null)
@@ -209,7 +220,7 @@ internal static Zone DeserializeZone(JsonElement element)
                     continue;
                 }
             }
-            return new Zone(id.Value, name.Value, type.Value, location, Optional.ToDictionary(tags), etag.Value, Optional.ToNullable(maxNumberOfRecordSets), Optional.ToNullable(numberOfRecordSets), Optional.ToList(nameServers), Optional.ToNullable(zoneType), Optional.ToList(registrationVirtualNetworks), Optional.ToList(resolutionVirtualNetworks));
+            return new Zone(id.Value, name.Value, type.Value, location, Optional.ToDictionary(tags), etag.Value, Optional.ToNullable(maxNumberOfRecordSets), Optional.ToNullable(maxNumberOfRecordsPerRecordSet), Optional.ToNullable(numberOfRecordSets), Optional.ToList(nameServers), Optional.ToNullable(zoneType), Optional.ToList(registrationVirtualNetworks), Optional.ToList(resolutionVirtualNetworks));
         }
     }
 }
diff --git a/sdk/dns/Azure.ResourceManager.Dns/src/Generated/Models/Zone.cs b/sdk/dns/Azure.ResourceManager.Dns/src/Generated/Models/Zone.cs
index 172f43b35bc8..0223748bf6f3 100644
--- a/sdk/dns/Azure.ResourceManager.Dns/src/Generated/Models/Zone.cs
+++ b/sdk/dns/Azure.ResourceManager.Dns/src/Generated/Models/Zone.cs
@@ -37,15 +37,17 @@ public Zone(string location) : base(location)
         /// <param name="tags"> Resource tags. </param>
         /// <param name="etag"> The etag of the zone. </param>
         /// <param name="maxNumberOfRecordSets"> The maximum number of record sets that can be created in this DNS zone.  This is a read-only property and any attempt to set this value will be ignored. </param>
+        /// <param name="maxNumberOfRecordsPerRecordSet"> The maximum number of records per record set that can be created in this DNS zone.  This is a read-only property and any attempt to set this value will be ignored. </param>
         /// <param name="numberOfRecordSets"> The current number of record sets in this DNS zone.  This is a read-only property and any attempt to set this value will be ignored. </param>
         /// <param name="nameServers"> The name servers for this DNS zone. This is a read-only property and any attempt to set this value will be ignored. </param>
         /// <param name="zoneType"> The type of this DNS zone (Public or Private). </param>
         /// <param name="registrationVirtualNetworks"> A list of references to virtual networks that register hostnames in this DNS zone. This is a only when ZoneType is Private. </param>
         /// <param name="resolutionVirtualNetworks"> A list of references to virtual networks that resolve records in this DNS zone. This is a only when ZoneType is Private. </param>
-        internal Zone(string id, string name, string type, string location, IDictionary<string, string> tags, string etag, long? maxNumberOfRecordSets, long? numberOfRecordSets, IReadOnlyList<string> nameServers, ZoneType? zoneType, IList<SubResource> registrationVirtualNetworks, IList<SubResource> resolutionVirtualNetworks) : base(id, name, type, location, tags)
+        internal Zone(string id, string name, string type, string location, IDictionary<string, string> tags, string etag, long? maxNumberOfRecordSets, long? maxNumberOfRecordsPerRecordSet, long? numberOfRecordSets, IReadOnlyList<string> nameServers, ZoneType? zoneType, IList<SubResource> registrationVirtualNetworks, IList<SubResource> resolutionVirtualNetworks) : base(id, name, type, location, tags)
         {
             Etag = etag;
             MaxNumberOfRecordSets = maxNumberOfRecordSets;
+            MaxNumberOfRecordsPerRecordSet = maxNumberOfRecordsPerRecordSet;
             NumberOfRecordSets = numberOfRecordSets;
             NameServers = nameServers;
             ZoneType = zoneType;
@@ -57,6 +59,8 @@ internal Zone(string id, string name, string type, string location, IDictionary<
         public string Etag { get; set; }
         /// <summary> The maximum number of record sets that can be created in this DNS zone.  This is a read-only property and any attempt to set this value will be ignored. </summary>
         public long? MaxNumberOfRecordSets { get; }
+        /// <summary> The maximum number of records per record set that can be created in this DNS zone.  This is a read-only property and any attempt to set this value will be ignored. </summary>
+        public long? MaxNumberOfRecordsPerRecordSet { get; }
         /// <summary> The current number of record sets in this DNS zone.  This is a read-only property and any attempt to set this value will be ignored. </summary>
         public long? NumberOfRecordSets { get; }
         /// <summary> The name servers for this DNS zone. This is a read-only property and any attempt to set this value will be ignored. </summary>
diff --git a/sdk/dns/Azure.ResourceManager.Dns/src/autorest.md b/sdk/dns/Azure.ResourceManager.Dns/src/autorest.md
index 2e64b4e0336d..a8a43675f5cf 100644
--- a/sdk/dns/Azure.ResourceManager.Dns/src/autorest.md
+++ b/sdk/dns/Azure.ResourceManager.Dns/src/autorest.md
@@ -5,7 +5,7 @@ Run `dotnet build /t:GenerateCode` to generate code.
 ``` yaml
 
 azure-arm: true
-require: https://raw.githubusercontent.com/Azure/azure-rest-api-specs/e0996d4f6dbca40ebf2fa4abf9a1cba45ada94d8/specification/dns/resource-manager/readme.md
+require: https://github.com/Azure/azure-rest-api-specs/blob/7569296f2b3ef6af7309c6310a896caf4961b2f1/specification/dns/resource-manager/readme.md
  
 
-```
\ No newline at end of file
+```