docs: mention desktop support for AD and local users (#53369)

docs/pages/enroll-resources/desktop-access/active-directory.mdx

@@ -644,8 +644,6 @@ To create a role for accessing Windows desktops:
        windows_desktop_logins: ["jsmith"]
    ```
 
-   Note that user names shared between domain and local users create login conflicts.
-
 1. Create the role:
 
    ```code

docs/pages/enroll-resources/desktop-access/getting-started.mdx

@@ -70,7 +70,15 @@ $ curl.exe -fo teleport-windows-auth-setup-v(=teleport.version=)-amd64.exe https
    - Enables Windows to trust the Teleport certificate authority.
    - Installs the required dynamic link library (DLL) for Teleport to use.
    - Disables Network Level Authentication (NLA) for remote desktop services.
-   - Enables RemoteFX compression, if using Teleport version 15 or newer.
+   - Enables RemoteFX compression.
+
+  In versions below Teleport 17.4.0, the Windows auth package for local users is
+  "greedy" and attempts to process all smart card logins. This prevents smart
+  card logins from outside of Teleport from working, and also makes it
+  impossible to use Teleport to connect as Active Directory users. This is no
+  longer the case with Teleport 17.4.0 and up. To connect as local users and
+  Active Directory users on the same host, you need to register the host twice
+  with Teleport, once with `ad: true` and once with `ad: false`.
 
   Note: in order for the Windows Local Security Authority (LSA) to load the Teleport DLL,
   [LSA protection](https://learn.microsoft.com/en-us/windows-server/security/credentials-protection-and-management/configuring-additional-lsa-protection)