limited number of entries with ICAL basic.ics

I set up a new calendar within my own workplace and filled it with appointments (including some recurring events).
Everything is fine within Vibe.

When I use die ICal link just below my new calendar I'm able to download a file "basic.ics"
Unfortunately the file does not contain all the events and appointments of the selected calendar. A closer look reveals that only 100 entries (the newest ones) were exported to basic.ics.

Questions are:
1. Is there a build in limit for the number of entries to be exported?
2. is it possible to resize the number?? If so, where can I change the number of entries?

Looking forward to your replies
Ben