outlook kan de internetagenda niet synchen, ik krijg een helebole foutmeldingen

hi joris, welcome in community

The error message indicates that Outlook can’t parse the “TRIGGER” property in an Internet calendar (.ics file). This usually happens with non-standard or malformed iCalendar data that Outlook doesn’t fully support.

Possible causes

The iCalendar (.ics) file contains unsupported properties or incorrect syntax.

Outlook version may have limited compatibility with certain iCalendar formats.

The calendar feed is corrupted or includes non-standard extensions.

How to fix it

• Update Outlook to the latest version — parsing issues are often fixed in updates.
• Remove or edit the calendar feed and delete any “TRIGGER” lines if you control the file.
• Re-import the calendar manually instead of using a live Internet subscription.
• Use another calendar app (e.g., Thunderbird or Apple Calendar) if the feed can’t be modified.
• If the calendar is from a third party, report the issue so they can fix their .ics format.The error message indicates that Outlook can’t parse the “TRIGGER” property in an Internet calendar (.ics file). This usually happens with non-standard or malformed iCalendar data that Outlook doesn’t fully support.

do you have ICS file downloaded? can you share it?

let me know

Elvis