I need to create a list of email addresses of those I've been emailing and who have been emailing me via my office 365 email account.
If it were a hundred or so people then I'd just do it by hand (make a contact for each one, then export the contact list), but I have thousands of people I've been in contact with that I need to record. I do have access to the admin panel on office 365 if needed.
What is the easiest method for me to extract a list of email addresses from my email itself, including email recipients for emails I've sent, and email senders for emails I've received?