The Participant.Left event is sent when a participant leaves a conference.

  "eventType": "Participant.Left",
  "conference": {
    "confId": "conferenceId_UUID",
    "confAlias": "example_conference_alias"
  "thirdPartyId": "example_thirdpartyId",
  "region": "eu",
  "participant": {
    "userId": "userId_UUID",
    "externalId": "example_externalId",
    "externalName": "example_externalName",
    "externalPhotoUrl": "example_externalPhotoUrl"
  "reason": "reason"

The following table explains all fields of the webhook object:

Field nameObjectTypeMeaningExample
eventTypeRootStringThe type of the webhook event.Participant.Left
conference.confIdRootString in UUID formatThe identifier of the conference.a88484c6-2a47-4691-86e2-933eec80b316
conference. confAliasRootStringThe alias of the conference.virtual event 1
thirdPartyIdRootStringThe app key. If you implemented a common webhook listener for multiple applications, this can help you to distinguish which application is this webhook event for.XSTXp4EsAmMrcw4g==
regionRootStringThe conference creation region. The possible values are: ca: Canada, us: United States, eu: Europe, in: India, au: Australiaeu
participant. userIdParticipantStringThe participant ID generated by Dolby.00000000-0000-0000-0000-000000000000
participant. externalIdParticipantStringThe external ID of the participant.[email protected]
participant. externalNameParticipantStringThe external name of the participantJane Smith
participant. externalPhotoUrlParticipantStringThe participant's avatar URL.-
reasonRootStringReason for leaving the conference, either hangUp, timeoutEviction, or forced.hangUp