How to Minimize Window to Tray Automatically upon Its Startup
Create specific settings for the desired target window.
Go to the Minimizing property sheet of just created settings.
Mark the the At startup check box in the Minimize Window Automatically group.
In the Options group select the tray radio button in the Minimization Mode group.
(Optional) If you'd like to put the target window to the system tray on a constant basis then select the Permanent radio button in the Tray Icon Options group.
(Optional) If you wish to prevent the target window from being auto-restored then mark the Block self-restoration check box in the Options group.
Apply your adjustments.