File Processor: Archive email attachments and collect every 'From' email address
This video demonstrates how you can configure File Processor to monitor an Office 365 Exchange mailbox. All attachments from the emails are being saved in a local or network folder and the email addresses are being collected and stored in a text file for later use (e.g. marketing).
https://www.fileprocessor.info
https://docs.winking.be/Tn/Article/201