o365-2.0.3/modules/o365_teams/o365_teams.routing.yml

o365_teams.send_message:
  path: '/user/ms-teams'
  defaults:
    _title: 'Send a message via Microsoft Teams'
    _form: 'Drupal\o365_teams\Form\O365TeamsSendMessageForm'
  requirements:
    _permission: 'send o365_teams message'

o365_teams.autocomplete.teams_recipients:
  path: '/o365_teams/autocomplete/teams-recipients'
  defaults:
    _controller: '\Drupal\o365_teams\Controller\TeamsRecipientAutocompleteController::handleAutocomplete'
    _format: json
  requirements:
    _permission: 'send o365_teams message'