Update active-directory-aadconnect-sso-quick-start.md

Author: swkrish

articles/active-directory/connect/active-directory-aadconnect-sso-quick-start.md

@@ -38,6 +38,9 @@ Ensure that the following prerequisites are in place:
 
 * **Use a supported Azure AD Connect topology**: Ensure that you are using one of Azure AD Connect's supported topologies described [here](active-directory-aadconnect-topologies.md).
 
+    >[!NOTE]
+    >Seamless SSO supports multiple AD forests, whether there is AD trusts between them or not.
+
 * **Set up domain administrator credentials**: You need to have domain administrator credentials for each Active Directory forest that:
     * You synchronize to Azure AD through Azure AD Connect.
     * Contains users you want to enable for Seamless SSO.