Outlook Safe Mode is a feature of Microsoft Outlook that helps users quickly diagnose and resolve problems experienced while using Outlook. It runs Outlook with minimal add-ins and disabled customization. This way, it prevents computer issues related to third-party programs, such as speed issues, crashes, and freezes. By disabling all third-party add-ins and running in safe mode, Outlook makes sure that only the standard components are loaded so that any issue could be detected and addressed.