diff --git a/docs/02-Deploying/03-Configuration.md b/docs/02-Deploying/03-Configuration.md
index e2355331e..5320d84c8 100644
--- a/docs/02-Deploying/03-Configuration.md
+++ b/docs/02-Deploying/03-Configuration.md
@@ -1989,6 +1989,8 @@ Fleet supports both SP-initiated SAML login and IDP-initiated login, however IDP
 
 Fleet supports the SAML Web Browser SSO Profile using the HTTP Redirect Binding.
 
+_**Note that the email being used in the SAML Assertion must match a user that already exists in Fleet.**_
+
 ### Identity Provider (IDP) Configuration
 
 Setting up the service provider (Fleet) with an identity provider generally requires the following information: