Disable certificate validation

These simple steps show how you how to disable certificate validation on macOS

Disable Certificate validation

Certificate validation is turned on by default. It's not recommended to turn it off, it significantly increases the risk of Man in The Middle (MiTM) attacks. You can turn it off for troubleshooting purposes.

  1. Select Options

    Select the OneCalendar menu on the top left, and select the option "Options".

  2. Select Security

    Select the option "Security" in the menu.

  3. Disable Certificate validation

    Set the option "Validate certificates" to OFF.

    NOTE: This does not work for all calendar types.