Outlook Command-Line Switches. Many of you will already know that there are a number of useful Outlook command line switches that you can use for a large variety of troubleshooting purposes such as; cleaning up the Calendar, cleaning and regenerating Free/Busy and Reminders, starting Outlook in Safe mode to skip previews and toolbar customisations… can you remember them all however? There's a full list in the second half of this article. [MS Exchange Blog]