diff --git a/MFaaP.MFWSClient/MFWSClient.Authentication.cs b/MFaaP.MFWSClient/MFWSClient.Authentication.cs
index 971145d..9accc84 100644
--- a/MFaaP.MFWSClient/MFWSClient.Authentication.cs
+++ b/MFaaP.MFWSClient/MFWSClient.Authentication.cs
@@ -22,10 +22,15 @@ public partial class MFWSClient
 		/// </summary>
 		protected const string XAuthenticationHttpHeaderName = "X-Authentication";
 
+		/// <summary>
+		/// The HTTP header name used to maintain the active vault (if multiple vaults and using SSO).
+		/// </summary>
+		protected const string XActiveVaultHttpHeaderName = "X-Active-Vault";
+
 		/// <summary>
 		/// The HTTP header name used for the vault guid (<see cref="AddVaultHeader(System.Guid)"/>).
 		/// </summary>
-		protected const string VaultHttpHeaderName = "X-Vault";
+		protected const string XVaultHttpHeaderName = "X-Vault";
 
 		/// <summary>
 		/// This is the authentication token used in the request headers.
@@ -69,7 +74,7 @@ public void AddVaultHeader(Guid vaultGuid)
 		/// <remarks>Typically used with OAuth authentication tokens.</remarks>
 		public void AddVaultHeader(string vaultGuid)
 		{
-			this.AddDefaultHeader(MFWSClient.VaultHttpHeaderName, vaultGuid);
+			this.AddDefaultHeader(MFWSClient.XVaultHttpHeaderName, vaultGuid);
 		}
 
 		/// <summary>
@@ -78,7 +83,7 @@ public void AddVaultHeader(string vaultGuid)
 		public void ClearVaultHeader()
 		{
 			// Remove the authorisation header.
-			foreach (var parameter in this.DefaultParameters.Where(p => p.Name == MFWSClient.VaultHttpHeaderName)
+			foreach (var parameter in this.DefaultParameters.Where(p => p.Name == MFWSClient.XVaultHttpHeaderName)
 				.ToArray())
 			{
 				this.DefaultParameters.Remove(parameter);
@@ -98,7 +103,13 @@ protected virtual void ClearAuthenticationToken()
 			this.CookieContainer = new CookieContainer();
 
 			// Remove the authorisation header.
-			foreach (var parameter in this.DefaultParameters.Where(p => p.Name == MFWSClient.AuthorizationHttpHeaderName)
+			foreach (var parameter in this
+				.DefaultParameters
+				.Where
+				(
+					p => p.Name == MFWSClient.AuthorizationHttpHeaderName
+					|| p.Name == MFWSClient.XActiveVaultHttpHeaderName
+				)
 				.ToArray())
 			{
 				this.DefaultParameters.Remove(parameter);
@@ -137,6 +148,9 @@ protected virtual void ClearAuthenticationToken()
 					this.CookieContainer.Add(this.BaseUrl, new Cookie(cookie.Name, cookie.Value, cookie.Path, cookie.Domain));
 				}
 			}
+
+			// Ensure that the active vault is stored.
+			this.AddDefaultHeader(MFWSClient.XActiveVaultHttpHeaderName, vaultId.ToString("B"));
 		}
 
 		/// <summary>
diff --git a/MFaaP.MFWSClient/MFaaP.MFWSClient.csproj b/MFaaP.MFWSClient/MFaaP.MFWSClient.csproj
index 2101b5a..dd888a1 100644
--- a/MFaaP.MFWSClient/MFaaP.MFWSClient.csproj
+++ b/MFaaP.MFWSClient/MFaaP.MFWSClient.csproj
@@ -14,7 +14,7 @@
   </ItemGroup>
   
   <PropertyGroup>
-    <Version>1.2.3-alpha</Version>
+    <Version>1.2.4-alpha</Version>
     <Authors>M-Files Corporation</Authors>
     <Description>Sample .NET wrapper for the M-Files Web Service.  Not designed for production use.</Description>
     <Copyright>Copyright (c) 2020 onwards, M-Files Corporation</Copyright>
diff --git a/current/MFaaP.MFWSClient.1.2.3-alpha.nupkg b/current/MFaaP.MFWSClient.1.2.3-alpha.nupkg
deleted file mode 100644
index 94e98bb..0000000
Binary files a/current/MFaaP.MFWSClient.1.2.3-alpha.nupkg and /dev/null differ
diff --git a/current/MFaaP.MFWSClient.1.2.4-alpha.nupkg b/current/MFaaP.MFWSClient.1.2.4-alpha.nupkg
new file mode 100644
index 0000000..9e790b7
Binary files /dev/null and b/current/MFaaP.MFWSClient.1.2.4-alpha.nupkg differ