1. Open the message in the Outbox, then close the message.
2. Click on the message and press Delete.
3. Put Outlook in Offline Mode (File > work off-line).
4. Restart Outlook.
Modified on: Fri, 19 Jun, 2015 at 9:58 PM
1. Open the message in the Outbox, then close the message.
2. Click on the message and press Delete.
3. Put Outlook in Offline Mode (File > work off-line).
4. Restart Outlook.
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