diff --git a/Src/Witsml/EndpointBehaviour.cs b/Src/Witsml/EndpointBehaviour.cs
index 8e53b60c7..5196df138 100644
--- a/Src/Witsml/EndpointBehaviour.cs
+++ b/Src/Witsml/EndpointBehaviour.cs
@@ -1,8 +1,10 @@
 using System;
+using System.Net;
 using System.Net.Http;
 using System.ServiceModel.Channels;
 using System.ServiceModel.Description;
 using System.ServiceModel.Dispatcher;
+using System.ServiceModel.Security;
 using System.Threading;
 using System.Threading.Tasks;
 
@@ -28,10 +30,20 @@ public CustomDelegatingHandler(HttpMessageHandler handler)
             InnerHandler = handler;
         }
 
-        protected override Task<HttpResponseMessage> SendAsync(HttpRequestMessage request, CancellationToken cancellationToken)
+        protected override async Task<HttpResponseMessage> SendAsync(HttpRequestMessage request, CancellationToken cancellationToken)
         {
             request.Headers.Add("user-agent", "witsml-explorer");
-            return base.SendAsync(request, cancellationToken);
+            var response = await base.SendAsync(request, cancellationToken);
+
+            switch (response.StatusCode)
+            {
+                case HttpStatusCode.InternalServerError:
+                    throw new WitsmlRemoteServerRequestCrashedException("WITSML remote request failed on the server.");
+                case HttpStatusCode.Unauthorized:
+                case HttpStatusCode.Forbidden:
+                    throw new MessageSecurityException("Not able to authenticate to WITSML server with given credentials");
+            }
+            return response;
         }
     }
 }
diff --git a/Src/Witsml/WitsmlRemoteServerRequestCrashedException.cs b/Src/Witsml/WitsmlRemoteServerRequestCrashedException.cs
new file mode 100644
index 000000000..ffa1bdc21
--- /dev/null
+++ b/Src/Witsml/WitsmlRemoteServerRequestCrashedException.cs
@@ -0,0 +1,11 @@
+using System.ServiceModel;
+
+namespace Witsml;
+
+/// <summary>
+/// This class represents a custom exception for cases where a WITSML remote server request crash.
+/// </summary>
+public class WitsmlRemoteServerRequestCrashedException : CommunicationException
+{
+    public WitsmlRemoteServerRequestCrashedException(string message) : base(message) { }
+}
diff --git a/Src/WitsmlExplorer.Api/Middleware/ExceptionMiddleware.cs b/Src/WitsmlExplorer.Api/Middleware/ExceptionMiddleware.cs
index 0620210da..6c9b9e27a 100644
--- a/Src/WitsmlExplorer.Api/Middleware/ExceptionMiddleware.cs
+++ b/Src/WitsmlExplorer.Api/Middleware/ExceptionMiddleware.cs
@@ -8,6 +8,8 @@
 
 using Serilog;
 
+using Witsml;
+
 using WitsmlExplorer.Api.Configuration;
 using WitsmlExplorer.Api.Extensions;
 using WitsmlExplorer.Api.HttpHandlers;
@@ -51,6 +53,16 @@ public async Task InvokeAsync(HttpContext httpContext)
                 };
                 await HandleExceptionAsync(httpContext, errorDetails);
             }
+            catch (WitsmlRemoteServerRequestCrashedException ex)
+            {
+                Log.Error($"Invalid response from server: {ex}");
+                ErrorDetails errorDetails = new()
+                {
+                    StatusCode = (int)HttpStatusCode.InternalServerError,
+                    Message = "WITSML remote request failed on the server."
+                };
+                await HandleExceptionAsync(httpContext, errorDetails);
+            }
             catch (MessageSecurityException ex)
             {
                 Log.Debug($"Not valid credentials: {ex}");