Ok im at work right now and I just tried
HKEY_CURRENT_USER \ Software \ Microsoft \ Office \ 9.0 \ Outlook \ Preferences
New Data Type: REG_DWORD
Value Name: MinToTray
Data: 1 (0 to disable MinToTray)
I also tried changing between binary and hex not that id think that was the cause... I closed reg edit and nothing, I rebooted and nothing. There must be something I am overlooking if everyone else is getting it to the systray.