This article describes update KB3191889 for Microsoft Outlook 2013, which was released on May 2, 2017. This update also applies to Office Home and Student 2013 RT. This update has a prerequisite.
Be aware that the update in the Microsoft Download Center applies to the Microsoft Installer (.msi)-based edition of Office 2013. It doesn't apply to the Office 2013 Click-to-Run editions, such as Microsoft Office 365 Home. (How to determine?)
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