The correct answer is Ctrl+U.
Key Points
- In Microsoft Outlook, pressing Ctrl+U marks a selected read e-mail as un-read.
Additional Information
- Microsoft Outlook Keyboard Shortcuts
|
Mark as unread |
Ctrl + U |
|
Go to “Tell me what you want to do” |
Alt + Q |
|
In the Reading Pane, go to the previous message. |
ALT+UP ARROW or CTRL+COMMA or ALT+PAGE UP |
|
In the Reading Pane, page down through the text. |
SPACEBAR |
|
In the Reading Pane, page up through text. |
SHIFT+SPACEBAR |
|
Go forward to the next view in the main Outlook window. |
ALT+RIGHT ARROW |
|
Mark a message as read |
Ctrl + Q |

