"No, it's mine, go and buy one by yourself"

And now you've got a pen that you didn't have at the start of the interview, and you've given capitalism a lesson of capitalism.

Below is a more detailed report about the IOCs, but indeed, they don't seem to want to say anything about the original source of the key leak.

https://www.microsoft.com/en-us/security/blog/2023/07/14/analysis-of-storm-0558-techniques-for-unauthorized-email-access/

I wish you well, you're not the only one facing this kind of problem lol.