Create RSS feed from Microsoft Live Calendar and Google Calendar

In Microsoft Calendar:

• Click "Share" on the top menu bar and select the calendar to share
• Under Share, click Get link. If this has already been done, the message "You've already created all possible link types" appears. If both cases, continue with next step

• Under Permissions, click Links to event details and select and copy the URL from the ICS textbox.

The URL from XML only contains a random subset of calendar events and can therefore not be used directly as a complete RSS feed.

That is why Google Calendar is needed:

In Google Calendar:

• On the main page, click on the down arrow next to Other Calendar and click "Add by URL"

• Paste the ICS link from the Microsoft Calendar. Replace the "webcal://" prefix with "http://". Enable "Make calendar publicly available?"
• Wait for the calendar to be added and click on the down arrow next to it
• In the section "Calendar Address", click on Change sharing settings and select "Make this calendar public" and press Save
• Again, click on the down arrow next to the calendar that was just added
• In the section "Calendar Address", click on the XML icon and copy the link
• Test the link in a browser by pasting it. Add "?max-results=99999" at the end of the URL to get all events.

By default only the 25 most recently changed events are shown. To get all events in the RSS feed:
www.google.com/calendar/feeds//private-/basic?max-results=99999