Hi JE_BuffaloIT,
Thanks for your post. Based on my research, there is only User Configurations for disabling the toast notification and hiding systray, you can use the following group policy.
For disabling the toast notification,
User Configuration -> Administrative Templates -> Start Menu and Taskbar->In right-side pane, double-click on "Disable showing balloon notifications as toasts" option and set it to Enabled.
For hiding systray,
User Configuration-> Administrative Templates-> Start Menu and Taskbar ->In right-side pane, double-click on “Hide the notification area” option and set it to Enabled.
Best Regards,
Ian Xue
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