diff --git a/sdk/storage/azure-storage-blobs/src/rest_client.cpp b/sdk/storage/azure-storage-blobs/src/rest_client.cpp
index 1678ac9b72..22277f0397 100644
--- a/sdk/storage/azure-storage-blobs/src/rest_client.cpp
+++ b/sdk/storage/azure-storage-blobs/src/rest_client.cpp
@@ -6023,8 +6023,11 @@ namespace Azure { namespace Storage { namespace Blobs {
             = Core::Convert::Base64Decode(pRawResponse->GetHeaders().at("x-ms-content-crc64"));
         response.TransactionalContentHash.Value().Algorithm = HashAlgorithm::Crc64;
       }
-      response.SequenceNumber
-          = std::stoll(pRawResponse->GetHeaders().at("x-ms-blob-sequence-number"));
+      if (pRawResponse->GetHeaders().count("x-ms-blob-sequence-number") != 0)
+      {
+        response.SequenceNumber
+            = std::stoll(pRawResponse->GetHeaders().at("x-ms-blob-sequence-number"));
+      }
       response.IsServerEncrypted
           = pRawResponse->GetHeaders().at("x-ms-request-server-encrypted") == std::string("true");
       if (pRawResponse->GetHeaders().count("x-ms-encryption-key-sha256") != 0)
@@ -6132,8 +6135,11 @@ namespace Azure { namespace Storage { namespace Blobs {
         response.LastModified = DateTime::Parse(
             pRawResponse->GetHeaders().at("Last-Modified"), Azure::DateTime::DateFormat::Rfc1123);
       }
-      response.SequenceNumber
-          = std::stoll(pRawResponse->GetHeaders().at("x-ms-blob-sequence-number"));
+      if (pRawResponse->GetHeaders().count("x-ms-blob-sequence-number") != 0)
+      {
+        response.SequenceNumber
+            = std::stoll(pRawResponse->GetHeaders().at("x-ms-blob-sequence-number"));
+      }
       return Response<Models::ClearPagesResult>(std::move(response), std::move(pRawResponse));
     }
     Response<Models::UploadPagesFromUriResult> PageBlobClient::UploadPagesFromUri(
@@ -6292,8 +6298,11 @@ namespace Azure { namespace Storage { namespace Blobs {
             = Core::Convert::Base64Decode(pRawResponse->GetHeaders().at("x-ms-content-crc64"));
         response.TransactionalContentHash.Value().Algorithm = HashAlgorithm::Crc64;
       }
-      response.SequenceNumber
-          = std::stoll(pRawResponse->GetHeaders().at("x-ms-blob-sequence-number"));
+      if (pRawResponse->GetHeaders().count("x-ms-blob-sequence-number") != 0)
+      {
+        response.SequenceNumber
+            = std::stoll(pRawResponse->GetHeaders().at("x-ms-blob-sequence-number"));
+      }
       response.IsServerEncrypted
           = pRawResponse->GetHeaders().at("x-ms-request-server-encrypted") == std::string("true");
       if (pRawResponse->GetHeaders().count("x-ms-encryption-key-sha256") != 0)
diff --git a/sdk/storage/azure-storage-blobs/swagger/README.md b/sdk/storage/azure-storage-blobs/swagger/README.md
index 2b34011ca2..66b8270fd4 100644
--- a/sdk/storage/azure-storage-blobs/swagger/README.md
+++ b/sdk/storage/azure-storage-blobs/swagger/README.md
@@ -515,6 +515,26 @@ directive:
           });
         }
       }
+  - from: swagger-document
+    where: $
+    transform: >
+      const operations = [
+        "PageBlob_UploadPages",
+        "PageBlob_ClearPages",
+        "PageBlob_UploadPagesFromUri",
+      ];
+      for (const url in $["x-ms-paths"]) {
+        for (const verb in $["x-ms-paths"][url]) {
+          if (!operations.includes($["x-ms-paths"][url][verb].operationId)) continue;
+          const operation = $["x-ms-paths"][url][verb];
+
+          const status_codes = Object.keys(operation.responses).filter(s => s !== "default");
+          status_codes.forEach((status_code, i) => {
+            operation.responses[status_code].headers["x-ms-blob-sequence-number"]["x-ms-client-default"] = "int64_t()";
+            operation.responses[status_code].headers["x-ms-blob-sequence-number"]["x-nullable"] = true;
+          });
+        }
+      }
 ```
 
 ### GetBlobServiceProperties