Symptoms
When you examine the Windows taskbar, the Outlook icon is not displayed even though Outlook is running and there is an Outlook icon in the notification area of the taskbar. The following figure demonstrates this problem.


Cause
This scenario occurs when you have enabled the Hide When Minimized option for Outlook and you minimize the main Outlook window. This option is available when you click the Outlook icon in the notification area.


Resolution
To change your Outlook configuration so that the Outlook icon is displayed in the taskbar when Outlook is running, use the following steps:
- Start Outlook if it is not running.
- Click the Outlook icon in the notification area.
- Select Hide When Minimized.
More Information
The Hide When Minimized option is controlled by the following registry data.
NoteThe x.0 placeholder represents your version of Office (16.0 = Office 2016, Office 365 and Office 2019, 15.0 = Office 2013, 14.0 = Office 2010, 12.0 = Office 2007, 11.0 = Office 2003).
Key: HKEY_CURRENT_USER\software\Microsoft\office\x.0\Outlook\Preferences
DWORD: MinToTray
Values:
DWORD: MinToTray
Values:
0 (or missing DWORD value) = Outlook icon displayed in the taskbar when Outlook is running
1 = Outlook icon is not displayed in the taskbar when Outlook is running and you minimize the Outlook window
1 = Outlook icon is not displayed in the taskbar when Outlook is running and you minimize the Outlook window
NoteThe x.0 placeholder represents your version of Office (16.0 = Office 2016, Office 365 and Office 2019, 15.0 = Office 2013, 14.0 = Office 2010, 12.0 = Office 2007, 11.0 = Office 2003).