Hello all!
I couldn't find a specific response for this question, hope you can help me.

The scenario is this. I sent an appointment to a coworker and attached some files (as objects), these files contain sensitive information

This person has his calendar shared to his team with (as my understanding) read/write permissions.

So my question is, if someone of his team opens any of the files, will I be notified as the meeting organizer?

Thank you and best regards!

No but you could send it as zip with password.

regards,
John