Updated: March 26, 2020

This article explains how to prevent / disable the Outlook security warning window on all modern Outlook versions, including Outlook 2019. The Outlook security warning window pops up whenever a non-trusted program (Outlook add-in, Macro script, etc) is trying to access Outlook and send email on your behalf. The goal of this Outlook security warning is to notify you about this action and prevent unauthorized Outlook access. However, if you actually want to use Outlook is a programmatic way, this Outlook security warning can become annoying.
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