Recover Outlook Mail from library folder on the hard disk

An E-mail I received from my colleague has gone missing from outlook, and from the chain of all replies. I assume there is a way it can be recalled by the sender, but I need proof this email was sent. When I search the Hard disk I can find the E-mail in the library folder, but it won't let me put this back into Outlook, and when I copy the file it won't open. I can only screenshot the file, so how do I recover the email properly?

Thanks for any help

Solution 1:

Can you found this email via Outlook search box? It is suggested for you to firstly log in your web mail and see if you can found this missing email message.

Besides, what is the file format you found in the library folder? As I know, for messages of .eml format, we can directly dag it to your Outlook Inbox folder. If it is a .olm file, you could import it to your Outlook client.