Step 1: Open your Outlook email client and select the mail folder whose emails older than a specific period you would like to delete.
Step 2: Then right click the folder and choose “Properties” from its context menu.
Step 3: Navigate to “Auto-Archive” tab and follow the steps below.
Step 4: If you’ve enabled “Archive items in this folder using the default settings” option, you should click on “Default Archive Settings” button. And later in the new “Auto-Archive” dialog box, you could specify the period in “Clean out items older than”. Besides, remember to check “Permanently delete old items”.
Step 5: If you’ve enabled “Archive this folder using these settings”, you could straightly change the older than period in the current screen and select “Permanently delete old items” feature.Archive Using these Settings
Step 6: Click on ‘Ok’ button and save the settings.