Enable Outlook XP to minimize to the System tray as older versions did.

Navigate the the location below in your registry.

Create a new REG_DWORD value named MinToTray and set the value to 1. Next time you restart Outlook XP it will minimize to the system tray instead of the Taskbar.

Key:[HKEY_CURRENT_USER\Software\Microsoft\Office\10.0\O utlook\Preferences]
Value Name: MinToTray
Data Type: REG_DWORD
Data: (0 = Taskbar, 1 = Systray)