Make sure you've created a WebCal link:
You can add your webcal link to Outlook by following these steps:
- Go to www.outlook.com
- Click on the blue icon in the top left and navigate to Calendar.
- Look for Add Calendar and click on it and select 'From internet'
- Paste your Webcal in the "Link to Calendar" field.
- Name your calendar to your liking and click on Save.
- Your Webcal has been added to your Outlook
If you have any additional questions or remarks, please contact firstname.lastname@example.org