diff --git a/src/Microsoft.Devices.HardwareDevCenterManager/Microsoft.Devices.HardwareDevCenterManager.csproj b/src/Microsoft.Devices.HardwareDevCenterManager/Microsoft.Devices.HardwareDevCenterManager.csproj
index ff9b727..96d7fa0 100644
--- a/src/Microsoft.Devices.HardwareDevCenterManager/Microsoft.Devices.HardwareDevCenterManager.csproj
+++ b/src/Microsoft.Devices.HardwareDevCenterManager/Microsoft.Devices.HardwareDevCenterManager.csproj
@@ -17,10 +17,10 @@
   </ItemGroup>
 
   <ItemGroup>
-    <PackageReference Include="Azure.Core" Version="1.38.0" />
-    <PackageReference Include="Azure.Identity" Version="1.11.4" />
-    <PackageReference Include="Azure.Storage.Blobs" Version="12.19.1" />
-    <PackageReference Include="Azure.Storage.Files.Shares" Version="12.17.1" />
+    <PackageReference Include="Azure.Core" Version="1.42.0" />
+    <PackageReference Include="Azure.Identity" Version="1.12.0" />
+    <PackageReference Include="Azure.Storage.Blobs" Version="12.21.1" />
+    <PackageReference Include="Azure.Storage.Files.Shares" Version="12.19.1" />
     <PackageReference Include="Microsoft.CSharp" Version="4.7.0" />
     <PackageReference Include="Microsoft.Extensions.Options" Version="8.0.2" />
     <PackageReference Include="System.Dynamic.Runtime" Version="4.3.0" />
diff --git a/src/Microsoft.Devices.HardwareDevCenterManager/Utility/AuthorizationHandler.cs b/src/Microsoft.Devices.HardwareDevCenterManager/Utility/AuthorizationHandler.cs
index bd6c41f..32b3e57 100644
--- a/src/Microsoft.Devices.HardwareDevCenterManager/Utility/AuthorizationHandler.cs
+++ b/src/Microsoft.Devices.HardwareDevCenterManager/Utility/AuthorizationHandler.cs
@@ -6,12 +6,14 @@
 
 using Azure.Core;
 using Azure.Identity;
+using Microsoft.Identity.Client;
 using System;
 using System.Collections.Generic;
 using System.IO;
 using System.Net;
 using System.Net.Http;
 using System.Net.Sockets;
+using System.Security.Cryptography.X509Certificates;
 using System.Threading;
 using System.Threading.Tasks;
 
@@ -61,6 +63,12 @@ protected override async Task<HttpResponseMessage> SendAsync(HttpRequestMessage
             await ObtainAccessToken();
         }
 
+        // don't attempt to make the call without a token
+        if (string.IsNullOrWhiteSpace(_accessToken) == true)
+        {
+            throw new CredentialUnavailableException("An access token wasn't available. Please check auth settings to ensure one can be created.");
+        }
+
         while (tries < _maxRetries)
         {
             tries++;
@@ -127,14 +135,22 @@ protected override async Task<HttpResponseMessage> SendAsync(HttpRequestMessage
 
     private async Task<AccessToken> ObtainAccessToken(CancellationToken cancellationToken = default)
     {
-        if (!string.IsNullOrEmpty(_authCredentials.ManagedIdentityClientId))
+        if (_authCredentials.X509Certificate2 != null)
+        {
+            return await GetTokenUsingX509Certificate2Async(_authCredentials.X509Certificate2, cancellationToken);
+        }
+
+        if (string.IsNullOrEmpty(_authCredentials.ManagedIdentityClientId) == false)
         {
             return await GetClientAssertionTokenAsync(cancellationToken);
         }
-        else
+
+        if (string.IsNullOrEmpty(_authCredentials.Key) == false)
         {
             return await GetTokenUsingClientSecretAsync(cancellationToken);
         }
+
+        return default;
     }
 
     private async Task<AccessToken> GetClientAssertionTokenAsync(CancellationToken cancellationToken)
@@ -152,12 +168,12 @@ private async Task<AccessToken> GetClientAssertionTokenAsync(CancellationToken c
             cancellationToken
         );
 
-        if (!string.IsNullOrEmpty(token.Token))
+        if (string.IsNullOrEmpty(token.Token) == false)
         {
             _accessToken = token.Token;
         }
 
-        return token;
+        return default;
     }
 
     /// <summary>
@@ -177,9 +193,27 @@ private async Task<string> GetTokenUsingManagedIdentityAsync(CancellationToken c
         return token.Token;
     }
 
-    private async Task<AccessToken> GetTokenUsingClientSecretAsync(CancellationToken cancellationToken)
+    private async Task<AccessToken> GetTokenUsingX509Certificate2Async(X509Certificate2 x509Certificate2, CancellationToken cancellationToken)
     {
+        var app = ConfidentialClientApplicationBuilder.Create(_authCredentials.ClientId)
+            .WithCertificate(_authCredentials.X509Certificate2, sendX5C: true)
+            .WithAuthority(_authCredentials.Authority)
+            .Build();
 
+        var authResult = await app.AcquireTokenForClient(new[] { "https://manage.devcenter.microsoft.com/.default" })
+            .ExecuteAsync(cancellationToken)
+            .ConfigureAwait(false);
+
+        if (string.IsNullOrEmpty(authResult.AccessToken) == false)
+        {
+            _accessToken = authResult.AccessToken;
+        }
+
+        return default;
+    }
+
+    private async Task<AccessToken> GetTokenUsingClientSecretAsync(CancellationToken cancellationToken)
+    {
         var credential = new ClientSecretCredential(
             _authCredentials.TenantId,
             _authCredentials.ClientId,
@@ -191,12 +225,12 @@ private async Task<AccessToken> GetTokenUsingClientSecretAsync(CancellationToken
             cancellationToken
         );
 
-        if (!string.IsNullOrEmpty(token.Token))
+        if (string.IsNullOrEmpty(token.Token) == false)
         {
             _accessToken = token.Token;
         }
 
-        return token;
+        return default;
     }
 
     //
diff --git a/src/Microsoft.Devices.HardwareDevCenterManager/Utility/AuthorizationHandlerCredentials.cs b/src/Microsoft.Devices.HardwareDevCenterManager/Utility/AuthorizationHandlerCredentials.cs
index 3a520a9..709059f 100644
--- a/src/Microsoft.Devices.HardwareDevCenterManager/Utility/AuthorizationHandlerCredentials.cs
+++ b/src/Microsoft.Devices.HardwareDevCenterManager/Utility/AuthorizationHandlerCredentials.cs
@@ -4,30 +4,48 @@
     Licensed under the MIT license. See LICENSE file in the project root for full license information.
 --*/
 
+using System.Security.Cryptography.X509Certificates;
 using System.Text.Json.Serialization;
 
 namespace Microsoft.Devices.HardwareDevCenterManager.Utility;
 
 public class AuthorizationHandlerCredentials
 {
-    [JsonPropertyName("key")]
-    public string Key { get; set; }
-
-    [JsonPropertyName("clientId")]
-    public string ClientId { get; set; }
+    // used for Azure
+    [JsonPropertyName("authority")]
+    public string Authority { get; set; }
 
     [JsonPropertyName("tenantId")]
     public string TenantId { get; set; }
 
-    [JsonPropertyName("url")]
-    public System.Uri Url { get; set; }
-
-    [JsonPropertyName("urlPrefix")]
-    public System.Uri UrlPrefix { get; set; }
+    [JsonPropertyName("clientId")]
+    public string ClientId { get; set; }
 
+    // used for managed identity
     [JsonPropertyName("managedIdentityClientId")]
     public string ManagedIdentityClientId { get; set; }
 
     [JsonPropertyName("scope")]
     public string Scope { get; set; }
+
+    // used for certificate
+    [JsonPropertyName("x509Certificate2")]
+    public X509Certificate2 X509Certificate2 { get; set; }
+
+    [JsonPropertyName("x509Certificate2Name")]
+    public string X509Certificate2Name { get; set; }
+
+    [JsonPropertyName("keyVaultUrl")]
+    public string KeyVaultUrl { get; set; }
+
+    // used for client credentials
+    [JsonPropertyName("key")]
+    public string Key { get; set; }
+
+    // used for HDC
+    [JsonPropertyName("url")]
+    public System.Uri Url { get; set; }
+
+    [JsonPropertyName("urlPrefix")]
+    public System.Uri UrlPrefix { get; set; }
 }
diff --git a/src/Microsoft.Devices.HardwareDevCenterManager/Utility/BlobStorageHandler.cs b/src/Microsoft.Devices.HardwareDevCenterManager/Utility/BlobStorageHandler.cs
index 5a029ca..c32cedc 100644
--- a/src/Microsoft.Devices.HardwareDevCenterManager/Utility/BlobStorageHandler.cs
+++ b/src/Microsoft.Devices.HardwareDevCenterManager/Utility/BlobStorageHandler.cs
@@ -20,10 +20,10 @@ public class BlobStorageHandler
     /// <summary>
     /// Handles upload and download of files for HDC Azure Blob Storage URLs
     /// </summary>
-    /// <param name="SASUrl">URL String to the blob</param>
-    public BlobStorageHandler(string SASUrl)
+    /// <param name="sasUrl">URL String to the blob</param>
+    public BlobStorageHandler(string sasUrl)
     {
-        _blockBlobClient = new BlockBlobClient(new Uri(SASUrl));
+        _blockBlobClient = new BlockBlobClient(new Uri(sasUrl));
     }
 
     /// <summary>
@@ -35,8 +35,8 @@ public async Task Upload(string filePath)
     {
         try
         {
-            using System.IO.FileStream fileStream = new(filePath, FileMode.Open, FileAccess.Read);
-            await _blockBlobClient.UploadAsync(fileStream, null, default);
+            using System.IO.FileStream fileStream = File.OpenRead(filePath);
+            await _blockBlobClient.UploadAsync(fileStream);
         }
         catch (RequestFailedException rfe)
         {