Linux broker needs a specific redirect_uri

A recent customer troubleshooting case reveals that the Linux broker
needs a specific redirect_uri as its prerequisite

Author: rayluo

msal/application.py

@@ -1948,8 +1948,6 @@ def __init__(
 
         .. note::
 
-            You may set enable_broker_on_windows and/or enable_broker_on_mac and/or enable_broker_on_linux and/or enable_broker_on_wsl to True.
-
             **What is a broker, and why use it?**
 
             A broker is a component installed on your device.
@@ -1967,22 +1965,26 @@ def __init__(
             so that your broker-enabled apps (even a CLI)
             could automatically SSO from a previously established signed-in session.
 
-            **You shall only enable broker when your app:**
+            **How to opt in to use broker?**
 
-            1. is running on supported platforms,
-               and already registered their corresponding redirect_uri
+            1. You can set any combination of the following opt-in parameters to true:
 
-               * ``ms-appx-web://Microsoft.AAD.BrokerPlugin/your_client_id``
-                 if your app is expected to run on Windows 10+
-               * ``msauth.com.msauth.unsignedapp://auth``
-                 if your app is expected to run on Mac
-               * ``ms-appx-web://Microsoft.AAD.BrokerPlugin/your_client_id``
-                 if your app is expected to run on Linux, especially WSL
+               +--------------------------+-----------------------------------+------------------------------------------------------------------------------------+
+               | Opt-in flag              | If app will run on                | App has registered this as a Desktop platform redirect URI in Azure Portal         |
+               +==========================+===================================+====================================================================================+
+               | enable_broker_on_windows | Windows 10+                       | ms-appx-web://Microsoft.AAD.BrokerPlugin/your_client_id                            |
+               +--------------------------+-----------------------------------+------------------------------------------------------------------------------------+
+               | enable_broker_on_wsl     | WSL                               | ms-appx-web://Microsoft.AAD.BrokerPlugin/your_client_id                            |
+               +--------------------------+-----------------------------------+------------------------------------------------------------------------------------+
+               | enable_broker_on_mac     | Mac with Company Portal installed | msauth.com.msauth.unsignedapp://auth                                               |
+               +--------------------------+-----------------------------------+------------------------------------------------------------------------------------+
+               | enable_broker_on_linux   | Linux with Intune installed       | ``https://login.microsoftonline.com/common/oauth2/nativeclient`` (MUST be enabled) |
+               +--------------------------+-----------------------------------+------------------------------------------------------------------------------------+
 
-            2. installed broker dependency,
+            2. Install broker dependency,
                e.g. ``pip install msal[broker]>=1.33,<2``.
 
-            3. tested with ``acquire_token_interactive()`` and ``acquire_token_silent()``.
+            3. Test with ``acquire_token_interactive()`` and ``acquire_token_silent()``.
 
             **The fallback behaviors of MSAL Python's broker support**
 

msal/broker.py

@@ -60,8 +60,10 @@ def _convert_error(error, client_id):
             or "AADSTS7000218" in context  # This "request body must contain ... client_secret" is just a symptom of current app has no WAM redirect_uri
             ):
         raise RedirectUriError(  # This would be seen by either the app developer or end user
-            "MsalRuntime needs the current app to register these redirect_uri "
-            "(1) ms-appx-web://Microsoft.AAD.BrokerPlugin/{} (2) {}".format(
+            """MsalRuntime needs the current app to register these redirect_uri
+(1) ms-appx-web://Microsoft.AAD.BrokerPlugin/{}
+(2) {}
+(3) https://login.microsoftonline.com/common/oauth2/nativeclient""".format(
             client_id, _redirect_uri_on_mac))
         # OTOH, AAD would emit other errors when other error handling branch was hit first,
         # so, the AADSTS50011/RedirectUriError is not guaranteed to happen.