diff --git a/src/Multifactor.Radius.Adapter.v2.Infrastructure/Features/PacketHandler/Adapters/AdapterResponseSender.cs b/src/Multifactor.Radius.Adapter.v2.Infrastructure/Features/PacketHandler/Adapters/AdapterResponseSender.cs
index b9addb6..ecc404a 100644
--- a/src/Multifactor.Radius.Adapter.v2.Infrastructure/Features/PacketHandler/Adapters/AdapterResponseSender.cs
+++ b/src/Multifactor.Radius.Adapter.v2.Infrastructure/Features/PacketHandler/Adapters/AdapterResponseSender.cs
@@ -176,14 +176,27 @@ private static void CopyAttributes(RadiusPacket? source, RadiusPacket? target)
     
     private void AddProxyStateAttribute(RadiusPacket source, RadiusPacket target)
     {
-        if (!source.Attributes.TryGetValue(ProxyStateAttribute, out var proxyStateAttribute)) return;
-        if (target.Attributes.ContainsKey(ProxyStateAttribute)) return;
-        var value = proxyStateAttribute.Values.FirstOrDefault();
-        if (value != null)
+        if (!source.Attributes.TryGetValue(ProxyStateAttribute, out var proxyStateAttribute))
+        {
+            
+            _logger.LogDebug("Source Attribute '{attrname:l}' is empty", ProxyStateAttribute);
+            return;
+        }
+        if (target.Attributes.ContainsKey(ProxyStateAttribute))
+        {
+            _logger.LogDebug("Target already contains attribute '{attrname:l}'", ProxyStateAttribute);
+            return;
+        }
+        var value = proxyStateAttribute.Values;
+        if (value is { Count: > 0 })
         {
             _logger.LogDebug("Added/replaced attribute '{attrname:l}' to reply", ProxyStateAttribute);
             target.AddAttributeValue(ProxyStateAttribute, value);
         }
+        else
+        {
+            _logger.LogDebug("Attribute '{attrname:l}' is empty", ProxyStateAttribute);
+        }
     }
     
     private static void AddMessageAuthenticatorIfMissing(RadiusPacket packet)
diff --git a/src/Multifactor.Radius.Adapter.v2.Infrastructure/Features/PacketHandler/Adapters/Radius/RadiusPacketBuilder.cs b/src/Multifactor.Radius.Adapter.v2.Infrastructure/Features/PacketHandler/Adapters/Radius/RadiusPacketBuilder.cs
index a9e81d1..6e17813 100644
--- a/src/Multifactor.Radius.Adapter.v2.Infrastructure/Features/PacketHandler/Adapters/Radius/RadiusPacketBuilder.cs
+++ b/src/Multifactor.Radius.Adapter.v2.Infrastructure/Features/PacketHandler/Adapters/Radius/RadiusPacketBuilder.cs
@@ -1,3 +1,4 @@
+using System.Collections;
 using System.Net;
 using System.Text;
 using Multifactor.Radius.Adapter.v2.Application.Core.Enum;
@@ -210,10 +211,22 @@ private static byte[] GetAttributeValueBytes(object value)
                 contentBytes = BitConverter.GetBytes(val);
                 Array.Reverse(contentBytes);
                 return contentBytes;
+            case long val:
+                contentBytes = BitConverter.GetBytes(val);
+                Array.Reverse(contentBytes);
+                return contentBytes;
+            case ulong val:
+                contentBytes = BitConverter.GetBytes(val);
+                Array.Reverse(contentBytes);
+                return contentBytes;
             case byte[] val:
                 return val;
             case IPAddress val:
                 return val.GetAddressBytes();
+            case IEnumerable val:
+                return val.Cast<object>()
+                    .SelectMany(GetAttributeValueBytes)
+                    .ToArray();
             default:
                 throw new NotImplementedException();
         }