Update outlook.md

docs/extensions/outlook.md

@@ -1,7 +1,18 @@
-# iCal4j Extensions - Outlook
+# iCal4j Extensions - Microsoft Outlook
 
 Microsoft Outlook defines some additional iCalendar properties that are used internally to manage additional
 calendar features.
 
 Whilst these properties comply with the extended property naming convention (prefixed with `X-`),
 because Outlook is such a pervasive Calendar User Agent (CUA), it seems convenient to define them here.
+
+## Outlook Properties
+
+| Name | Description | Reference |
+|------|-------------|-----------|
+| ALL-DAY-EVENT |||
+| BUSY-STATUS |||
+| IMPORTANCE |||
+| INST-TYPE |||
+| ORIGINAL-END |||
+| ORIGINAL-START |||