Updated Microsoft app reg portal link

- Added external link to new application registration portal
- Removed reference to old portal

Author: Jackson-Woods

docs/examples/outlook.rst

@@ -1,12 +1,10 @@
 Outlook Calendar OAuth 2 Tutorial
 ==========================
 
-Create a new web application client in the `Microsoft Application Registration Portal`_
+Create a new web application client in the `Microsoft application registration portal <https://go.microsoft.com/fwlink/?linkid=2083908>`_
 When you have obtained a ``client_id``, ``client_secret`` and registered
 a callback URL then you can try out the command line interactive example below.
 
-.. _`Outlook App console`: https://apps.dev.microsoft.com
-
 .. code-block:: pycon
 
     >>> # This information is obtained upon registration of a new Outlook Application