2. Use Recent Items: If the file you're looking for is a recent item, you can access it directly from the "Recent Items" list within Outlook. Click on the "Attach" button in the email composition window, then select "Recent Items" from the dropdown menu. This should display a list of files that you've recently accessed or opened. More @Wikipedia
Hover over any link to get a description of the article. Please note that search keywords are sometimes hidden within the full article and don't appear in the description or title.