Open Calendar in the Vault to identify whether the missing change is on the server or only on one device.
- Verify the URL
https://vault.lightdrive.one/remote.php/dav/. - Use the full LightDrive email address and the correct account password or Vault app password.
- Confirm the affected calendar is selected and synchronization is enabled.
- Allow network access and background activity.
- Check the device time zone when an event appears at the wrong hour.
Update the stored credential after a password change. Do not accept a certificate exception.