If automatic subscription fails (for example, if you use a different calendar application than what your browser suggests), you will need to subscribe manually.
On the Kalenders page, select a calendar you like.
Click Selecteren.
If you are not logged in to WebCal.Guru, you will not be able to modify subscription settings and you will have significantly smaller selection of calendars. In this case, jump directly to Step 4.
Adjust the subscription settings if needed and click Aan Mijn kalenders toevoegen.
You will be taken to Mijn kalenders page. On the calendar you just added, click next to Downloaden and select Adres naar klembord kopiëren.
Open the Outlook application and make sure you're on the Home tab.
Open the Addmenu and select From Internet…
Click Yes.
Updated 8 Feb 2023