How to open Outlook when its unable to start

Relevant to: faculty, staff, and students

This article contains information considered accurate at the time of publishing. Technology updates, changes in University security practices, and/or policies and procedures may affect the information in this article - updates to articles are scheduled on a periodic basis and will address any required changes.

Safe Mode

If Outlook worked correctly the last time and nothing has changed about your account configuration, then checking if things work correctly in Safe Mode is a good first step. Starting Outlook in Safe Mode will prevent some or all add-ins from being loaded, prevents several settings files from being loaded and turns off the Reading Pane.

To start Outlook in Safe Mode you’ll need to start Outlook with the “safe” switch:

  • Windows 7
    Start → type; outlook.exe /safe
  • Windows 8
    Start Screen → type; outlook.exe /safe
    (just start typing, a search box will automatically become visible)
  • Windows 10
    Start → type; outlook.exe /safe
    (just start typing, a search box will automatically become visible or type in the command in the Cortana Search box)
  • All Windows versions
    Hold the CTRL button when clicking on the Outlook button to start it. You will get prompted whether you want to start Outlook in Safe Mode.

When typing, please note the space between outlook.exe and /safe.