diff --git a/Microsoft.Identity.Web/TokenAcquisition.cs b/Microsoft.Identity.Web/TokenAcquisition.cs
index 1b655cab..0b7878a9 100644
--- a/Microsoft.Identity.Web/TokenAcquisition.cs
+++ b/Microsoft.Identity.Web/TokenAcquisition.cs
@@ -317,7 +317,7 @@ private IConfidentialClientApplication BuildConfidentialClientApplication()
                 request.PathBase,
                 azureAdOptions.CallbackPath ?? string.Empty);
 
-            string authority = $"{azureAdOptions.Instance}{azureAdOptions.TenantId}/";
+            string authority = $"{applicationOptions.Instance}{applicationOptions.TenantId}/";
 
             var app = ConfidentialClientApplicationBuilder
                 .CreateWithApplicationOptions(applicationOptions)