Open Outlook
Click the Search box at the top
Type a keyword, sender name, or subject
Press Enter
Select the folder or mailbox you want to search in
Use Search Tools or Search tab to refine results
Choose All Mailboxes if the email may be in another folder
Check the Archive folder if your Outlook uses one
Open the folder list and look for Archive or Online Archive
Expand the mailbox to view archived folders
Use filters such as From, Subject, Has Attachments, or Date
Sort results by date if needed
If using Outlook on the web, click Archive in the left pane
If using Outlook desktop, use Advanced Find for more specific searches
Search for the exact email address if you know it
Search within a date range if you remember when it was received
Open the archived email from the search results or archive folder