How to export emails in the sent items folder of a specific mailbox

In order to export emails in the sent items folder of a specific mailbox,

1. Create and run a content search as per the instructions in the article below,
Create and run a Content search in the Microsoft 365 compliance center - Microsoft 365 Compliance | Microsoft Docs

2. On the Locations page, choose the content location "Exchange mailboxes" as per the instruction in point 5 of the article mentioned above

3. On the Define your search conditions page, add conditions select Sender and type in the email address of the user whose emails in Sent Items folder you wanted to export as per the instruction in point 6 of the article mentioned above