diff --git a/example/SignalCopy/Program.cs b/example/SignalCopy/Program.cs
index f77c169..b831266 100644
--- a/example/SignalCopy/Program.cs
+++ b/example/SignalCopy/Program.cs
@@ -2,7 +2,6 @@
 using System.Threading.Tasks;
 using DocoptNet;
 using Seq.Api;
-using System.Linq;
 using Seq.Api.Model.Signals;
 using System.Collections.Generic;
 
diff --git a/example/SignalCopy/Properties/launchSettings.json b/example/SignalCopy/Properties/launchSettings.json
index f57dda9..16428f3 100644
--- a/example/SignalCopy/Properties/launchSettings.json
+++ b/example/SignalCopy/Properties/launchSettings.json
@@ -2,7 +2,7 @@
   "profiles": {
     "SignalCopy": {
       "commandName": "Project",
-      "commandLineArgs": "http://localhost:5341 http://localhost:5342 --srckey=fSCcBOyOfttZ0kiZFgq"
+      "commandLineArgs": "http://localhost:5341 http://localhost:5342"
     }
   }
 }
\ No newline at end of file
diff --git a/src/Seq.Api/Api/Client/SeqApiClient.cs b/src/Seq.Api/Api/Client/SeqApiClient.cs
index 30df9b7..08da47c 100644
--- a/src/Seq.Api/Api/Client/SeqApiClient.cs
+++ b/src/Seq.Api/Api/Client/SeqApiClient.cs
@@ -45,7 +45,7 @@ public SeqApiClient(string serverUrl, string apiKey = null)
             if (!string.IsNullOrEmpty(apiKey))
                 _apiKey = apiKey;
 
-            var handler = new HttpClientHandler { CookieContainer = _cookies };
+            var handler = new HttpClientHandler { CookieContainer = _cookies, UseDefaultCredentials = true };
 
             var baseAddress = serverUrl;
             if (!baseAddress.EndsWith("/"))
@@ -56,6 +56,8 @@ public SeqApiClient(string serverUrl, string apiKey = null)
 
         public string ServerUrl { get; }
 
+        public HttpClient HttpClient => _httpClient;
+
         public Task<RootEntity> GetRootAsync()
         {
             return HttpGetAsync<RootEntity>("api");
@@ -119,6 +121,14 @@ public async Task DeleteAsync<TEntity>(ILinked entity, string link, TEntity cont
             new StreamReader(stream).ReadToEnd();
         }
 
+        public async Task<TResponse> DeleteAsync<TEntity, TResponse>(ILinked entity, string link, TEntity content, IDictionary<string, object> parameters = null)
+        {
+            var linkUri = ResolveLink(entity, link, parameters);
+            var request = new HttpRequestMessage(HttpMethod.Delete, linkUri) { Content = MakeJsonContent(content) };
+            var stream = await HttpSendAsync(request).ConfigureAwait(false);
+            return _serializer.Deserialize<TResponse>(new JsonTextReader(new StreamReader(stream)));
+        }
+
         public async Task<ObservableStream<TEntity>> StreamAsync<TEntity>(ILinked entity, string link, IDictionary<string, object> parameters = null)
         {
             return await WebSocketStreamAsync(entity, link, parameters, reader => _serializer.Deserialize<TEntity>(new JsonTextReader(reader)));
diff --git a/src/Seq.Api/Api/ResourceGroups/ApiResourceGroup.cs b/src/Seq.Api/Api/ResourceGroups/ApiResourceGroup.cs
index 4555ef2..6616712 100644
--- a/src/Seq.Api/Api/ResourceGroups/ApiResourceGroup.cs
+++ b/src/Seq.Api/Api/ResourceGroups/ApiResourceGroup.cs
@@ -72,5 +72,11 @@ protected async Task GroupDeleteAsync<TEntity>(string link, TEntity content, IDi
             var group = await LoadGroupAsync().ConfigureAwait(false);
             await Client.DeleteAsync(group, link, content, parameters).ConfigureAwait(false);
         }
+
+        protected async Task<TResponse> GroupDeleteAsync<TEntity, TResponse>(string link, TEntity content, IDictionary<string, object> parameters = null)
+        {
+            var group = await LoadGroupAsync().ConfigureAwait(false);
+            return await Client.DeleteAsync<TEntity, TResponse>(group, link, content, parameters).ConfigureAwait(false);
+        }
     }
 }
diff --git a/src/Seq.Api/Api/ResourceGroups/EventsResourceGroup.cs b/src/Seq.Api/Api/ResourceGroups/EventsResourceGroup.cs
index beb8ce5..8610b36 100644
--- a/src/Seq.Api/Api/ResourceGroups/EventsResourceGroup.cs
+++ b/src/Seq.Api/Api/ResourceGroups/EventsResourceGroup.cs
@@ -155,7 +155,7 @@ public async Task<ResultSetPart> DeleteInSignalAsync(
             if (toDateUtc != null) { parameters.Add("toDateUtc", toDateUtc.Value); }
 
             var body = signal ?? new SignalEntity();
-            return await GroupPostAsync<SignalEntity, ResultSetPart>("DeleteInSignal", body, parameters).ConfigureAwait(false);
+            return await GroupDeleteAsync<SignalEntity, ResultSetPart>("DeleteInSignal", body, parameters).ConfigureAwait(false);
         }
 
         /// <summary>
diff --git a/src/Seq.Api/Api/ResourceGroups/UsersResourceGroup.cs b/src/Seq.Api/Api/ResourceGroups/UsersResourceGroup.cs
index d01e712..83baf25 100644
--- a/src/Seq.Api/Api/ResourceGroups/UsersResourceGroup.cs
+++ b/src/Seq.Api/Api/ResourceGroups/UsersResourceGroup.cs
@@ -2,6 +2,8 @@
 using System.Collections.Generic;
 using System.Threading.Tasks;
 using Seq.Api.Model.Users;
+using System.Linq;
+using Seq.Api.Client;
 
 namespace Seq.Api.ResourceGroups
 {
@@ -65,5 +67,16 @@ public async Task<SearchHistoryEntity> GetSearchHistoryAsync(UserEntity entity)
         {
             return await Client.GetAsync<SearchHistoryEntity>(entity, "SearchHistory").ConfigureAwait(false);
         }
+
+        public async Task<UserEntity> LoginWindowsIntegratedAsync()
+        {
+            var providers = await GroupGetAsync<AuthProvidersPart>("AuthenticationProviders").ConfigureAwait(false);
+            var provider = providers.Providers.SingleOrDefault(p => p.Name == "Integrated Windows Authentication");
+            if (provider == null)
+                throw new SeqApiException("The Integrated Windows Authentication provider is not available.");
+            var response = await Client.HttpClient.GetAsync(provider.Url).ConfigureAwait(false);
+            response.EnsureSuccessStatusCode();
+            return await FindCurrentAsync().ConfigureAwait(false);
+        }
     }
 }
diff --git a/src/Seq.Api/project.json b/src/Seq.Api/project.json
index 2fb94bd..e704106 100644
--- a/src/Seq.Api/project.json
+++ b/src/Seq.Api/project.json
@@ -1,5 +1,5 @@
 {
-  "version": "3.4.2-*",
+  "version": "3.4.3-*",
 
   "description": "Client library for the Seq HTTP API.",
   "authors": [ "Datalust", "Contributors" ],