Disable Outlook New Mail Desktop Alert

Disabling Outlook 2003 Email Alert Pop-ups
http://www.windowsitpro.com/article/email/disabling-outlook-2003-email-alert-pop-ups

Can you tell me how to prevent Outlook 2003 from popping up an alert from the Windows system tray when a new email message arrives? I know how to disable alerts manually on each machine, but I'd like to turn off pop-ups for a group of users all at once.

The Outlk11.adm administrative template provides a Group Policy setting to manage that option.
Open Group Policy Editor (GPE) and navigate to

  • -> User Configuration,
  • -> Administrator Templates,
  • -> Tools,
  • -> Options,
  • -> Preferences,
  • -> E-mail options,
  • -> Advanced E-mail options,
  • -> Desktop Alert.

The Check to disable New Mail Desktop Alert policy setting controls the DWORD registry value

NewmailDesktopAlerts

which at

HKEY_CURRENT_USER\Software\Policies\Microsoft\Office\11.0\Outlook\Preferences

The default value data (0) enables alerts. To disable alerts, change the value data to 1.