Sent messages don't get filed, but received ones do.
The Outlook option: Save copies of messages in Sent Items folder is not set correctly for the type of mail account.
Account type: Microsoft Exchange
Outlook 2010/2013
| • | In the Email Options settings reached by selecting File > Options > Mail > Save messages: |
| • | Ensure Save copies of messages in Sent Items folder is checked |
Outlook 2007
| • | In the Email Options settings reached by selecting Tools > Options > Preferences > Email options: |
| • | Ensure Save copies of messages in Sent Items folder is checked |
Account type: IMAP
Outlook 2010/2013
| • | In the Email Options settings reached by selecting File > Options > Mail > Save messages: |
| • | Ensure Save copies of messages in Sent Items folder is unchecked |
Outlook 2007
| • | In the Email Options settings reached by selecting Tools > Options > Preferences > Email options: |
| • | Ensure Save copies of messages in Sent Items folder is unchecked |