diff --git a/src/core/DigitalData.MessagingService.Application/DependencyInjection/DependencyInjection.cs b/src/core/DigitalData.MessagingService.Application/DependencyInjection/DependencyInjection.cs
index 000e580..74af05c 100644
--- a/src/core/DigitalData.MessagingService.Application/DependencyInjection/DependencyInjection.cs
+++ b/src/core/DigitalData.MessagingService.Application/DependencyInjection/DependencyInjection.cs
@@ -1,6 +1,5 @@
 #if NET
 using FluentValidation;
-using Microsoft.Extensions.Configuration;
 using Microsoft.Extensions.DependencyInjection;
 using System.Reflection;
 
@@ -11,25 +10,21 @@ namespace DigitalData.MessagingService.Application.DependencyInjection;
 /// </summary>
 public static class DependencyInjection
 {
-    public static IServiceCollection AddMessagingServiceApplication(this IServiceCollection services, Action<MessagingServiceApplicationConfiguration> configure)
+    public static IServiceCollection AddMessagingServiceApplication(this IServiceCollection services, string luckyPennySoftLicenseKey)
     {
         var assembly = Assembly.GetExecutingAssembly();
 
-        var configuration = new MessagingServiceApplicationConfiguration(services);
-        configure(configuration);
-        configuration.EnsureConfigured();
-
         // MediatR - Register all handlers
         services.AddMediatR(config =>
         {
-            config.LicenseKey = configuration.LuckyPennySoftLicenseKey;
+            config.LicenseKey = luckyPennySoftLicenseKey;
             config.RegisterServicesFromAssembly(assembly);
         });
 
         // AutoMapper - Use built-in DI extension (AutoMapper 16.2.0+)
         services.AddAutoMapper(config =>
         {
-            config.LicenseKey = configuration.LuckyPennySoftLicenseKey;
+            config.LicenseKey = luckyPennySoftLicenseKey;
             config.AddMaps(assembly);
         });
 
diff --git a/src/core/DigitalData.MessagingService.Application/DependencyInjection/MessagingServiceApplicationConfiguration.cs b/src/core/DigitalData.MessagingService.Application/DependencyInjection/MessagingServiceApplicationConfiguration.cs
deleted file mode 100644
index d0e6cf3..0000000
--- a/src/core/DigitalData.MessagingService.Application/DependencyInjection/MessagingServiceApplicationConfiguration.cs
+++ /dev/null
@@ -1,37 +0,0 @@
-#if NET
-using Microsoft.Extensions.Configuration;
-
-namespace DigitalData.MessagingService.Application.DependencyInjection;
-
-public partial class MessagingServiceApplicationConfiguration
-{
-    private bool _luckyPennySoftLicenseKeyAdded = false;
-
-    internal void EnsureConfigured()
-    {
-        if (!_luckyPennySoftLicenseKeyAdded)
-        {
-            throw new InvalidOperationException("LuckyPennySoftLicenseKey is not configured. Please call SetLuckyPennySoftLicenseKey() or SetLuckyPennySoftLicenseKey(IConfiguration) in DI configuration.");
-        }
-    }
-
-    #region LuckyPennySoftLicenseKey
-    internal string? LuckyPennySoftLicenseKey { get; set; } = null;
-
-    public MessagingServiceApplicationConfiguration SetLuckyPennySoftLicenseKey(string licenseKey)
-    {
-        if (string.IsNullOrWhiteSpace(licenseKey))
-            throw new InvalidOperationException("LuckyPennySoftLicenseKey is not configured. Please call SetLuckyPennySoftLicenseKey() or SetLuckyPennySoftLicenseKey(IConfiguration) in DI configuration.");
-
-        LuckyPennySoftLicenseKey = licenseKey;
-        _luckyPennySoftLicenseKeyAdded = true;
-        return this;
-    }
-
-    public MessagingServiceApplicationConfiguration SetLuckyPennySoftLicenseKey(IConfiguration configuration, string key = "LuckyPennySoftLicenseKey")
-    {
-        return SetLuckyPennySoftLicenseKey(configuration.GetValue<string>(key) ?? string.Empty);
-    }
-    #endregion LuckyPennySoftLicenseKey
-}
-#endif
\ No newline at end of file
diff --git a/src/presentation/DigitalData.MessagingService.API/Program.cs b/src/presentation/DigitalData.MessagingService.API/Program.cs
index eaa280b..3664458 100644
--- a/src/presentation/DigitalData.MessagingService.API/Program.cs
+++ b/src/presentation/DigitalData.MessagingService.API/Program.cs
@@ -65,7 +65,9 @@ try
     builder.Configuration.AddJsonFile("appsettings.Secrets.json", optional: true, reloadOnChange: true);
 
     // Register Application layer (MediatR, AutoMapper, FluentValidation)
-    builder.Services.AddMessagingServiceApplication(cfg => cfg.SetLuckyPennySoftLicenseKey(builder.Configuration));
+    var LuckyPennySoftLicenseKey = builder.Configuration.GetValue<string>("LuckyPennySoftLicenseKey")
+        ?? throw new InvalidOperationException("The required configuration value 'LuckyPennySoftLicenseKey' is missing. Please ensure it is properly configured.");
+    builder.Services.AddMessagingServiceApplication(LuckyPennySoftLicenseKey);
 
     // Register Infrastructure layer (RabbitMQ, Repositories, etc.)
     builder.Services.AddInfrastructure(cfg => cfg