- Go to "File"
- Select "Options"
- Select the "Save Messages" section
- Check the box for "Save copies of messages in Sent Items folder"
For Outlook 2016/365:
- Go to "File"
- Select "Options"
- Select the "Mail" tab
- Scroll down to the "Save Messages" section
- Check the box for "Save copies of messages in Sent Items folder"
These instructions also apply if your Sent Folder is Missing from your Outlook Client.