Guess it’s time to scrape your calendar from web?
You can also use the outlook COM API and extract the data from the running outlook instance [1]. See [2] for a python example that extracts a '.ics' file.
[1] https://learn.microsoft.com/en-us/office/vba/api/outlook.cal...
[2] https://github.com/TomSmeets/export-outlook-to-ics/blob/mast...
But corporate IT has apparently blocked being able to use graph-explorer.
Thank you anyway! :)