Microsoft supplies switches or flags that can be used following a Command-Line start of an application
After the Executable allow a space and the enter the Switch.
The Microsoft Outlook Help file contains an entry that lists command-line switches, which you can use to start Outlook in a specific mode or with a specific form.
This article lists additional command-line switches that are not included in the Outlook Help file.
Search for "Switches".
Here's a good one:
Starts Outlook, forces a detection of new meeting requests in the Inbox, and then adds them to the calendar