diff --git a/source/fundamentals/authentication/oidc.txt b/source/fundamentals/authentication/oidc.txt
index 66ebb19d..d9e85025 100644
--- a/source/fundamentals/authentication/oidc.txt
+++ b/source/fundamentals/authentication/oidc.txt
@@ -195,6 +195,12 @@ see the corresponding syntax.
             .CreateOidcCredential("k8s")
          var client = new MongoClient(mongoClientSettings);
 
+If your application runs on `Amazon Elastic Kubernetes Service <https://aws.amazon.com/eks/>`__
+(EKS), you must create an ``AWS_WEB_IDENTITY_TOKEN_FILE`` environment variable that points
+to the file containing your OIDC token, in addition to completing
+the preceding Kubernetes OIDC authentication steps. To learn more about authenticating to
+MongoDB from AWS applications, see the :ref:`csharp-authentication-aws` guide.
+
 Custom Callback
 ~~~~~~~~~~~~~~~