By utilizing Outlook rules, you can easily automate saving certain messages to M-Files, on the basis of, for instance, the message's sender or subject. Example: you can specify that all proposals sent are to be saved to M-Files on the basis that the subject contains the word proposal.
You can find the Outlook rules in the Tools menu (select Rules and Alerts). The rules are user-specific.
If Outlook is not open when the user receives a message that would be saved to M-Files according to the rule, M-Files will suggest Save pending messages now when Outlook is opened the next time.