o365-2.0.3/modules/o365_outlook_calendar/o365_outlook_calendar.routing.yml

o365_outlook_calendar.settings:
  path: '/admin/config/system/o365/settings/outlook-calendar'
  defaults:
    _title: 'Calendar settings'
    _form: 'Drupal\o365_outlook_calendar\Form\OutlookCalendarSettingsForm'
  requirements:
    _permission: 'administer o365_outlook_calendar settings'

o365_outlook_calendar.save_ajax_callback:
  path: '/o365/outlook_calendar/save-callback/{nid}'
  defaults:
    _controller: '\Drupal\o365_outlook_calendar\Controller\OutlookCalendarSaveAjaxController::ajaxLinkCallback'
  requirements:
    _permission: 'access content'