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Get change notifications for chats using Microsoft Graph

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Change notifications enable you to subscribe to changes (create and update) to chats. You can get notified whenever a chat is created or updated. You can also get the resource data in the notifications and therefore avoid calling the API to get the payload.

Continue with this article about scenarios for the chat resource. Or, find out about change notifications for other Microsoft Teams resources.

Note

If you request a subscription expirationDateTime that is more than 1 hour in the future, you must subscribe to lifecycle notifications by including a lifecycleNotificationUrl property in your subscription request. Otherwise your subscription request will fail with the following error message: lifecycleNotificationUrl is a required property for subscription creation on this resource when the expirationDateTime value is set to greater than 1 hour.

Subscribe to changes in any chat at tenant level

To get change notifications for all changes (create and update) related to any chat in a tenant, subscribe to /chats. This resource supports including resource data in the notification.

Permissions

Permission type Permissions (from least to most privileged)
Delegated (work or school account) Not supported.
Delegated (personal Microsoft account) Not supported.
Application Chat.ReadBasic.All, Chat.Read.All, Chat.ReadWrite.All

Example

POST https://graph.microsoft.com/v1.0/subscriptions
Content-Type: application/json

{
  "changeType": "created,updated",
  "notificationUrl": "https://webhook.azurewebsites.net/api/resourceNotifications",
  "resource": "/chats",
  "includeResourceData": true,
  "encryptionCertificate": "{base64encodedCertificate}",
  "encryptionCertificateId": "{customId}",
  "expirationDateTime": "2019-09-19T11:00:00.0000000Z",
  "clientState": "{secretClientState}"
}

Subscribe to changes in a particular chat

To get change notifications for all changes related to a particular chat, subscribe to /chats/{id}. This resource supports including resource data in the notification and providing the notifyOnUserSpecificProperties query string parameter in user context.

Permissions

Permission type Permissions (from least to most privileged)
Delegated (work or school account) Chat.ReadBasic, Chat.Read, Chat.ReadWrite
Delegated (personal Microsoft account) Not supported.
Application ChatSettings.Read.Chat*, ChatSettings.ReadWrite.Chat*, Chat.Manage.Chat*, Chat.ReadBasic.All, Chat.Read.All, Chat.ReadWrite.All

Note: Permissions marked with * use resource-specific consent.

Example 1: Subscribe to changes in a particular chat

The following example shows how to subscribe to receive notifications of changes in a particular chat.

POST https://graph.microsoft.com/v1.0/subscriptions
Content-Type: application/json

{
  "changeType": "updated",
  "notificationUrl": "https://webhook.azurewebsites.net/api/resourceNotifications",
  "resource": "/chats/{id}",
  "includeResourceData": true,
  "encryptionCertificate": "{base64encodedCertificate}",
  "encryptionCertificateId": "{customId}",
  "expirationDateTime": "2019-09-19T11:00:00.0000000Z",
  "clientState": "{secretClientState}"
}

Example 2: Subscribe to changes in a particular chat using the notifyOnUserSpecificProperties query parameter

The following example shows how to subscribe to receive notifications of changes in a particular chat by providing the notifyOnUserSpecificProperties query parameter.

POST https://graph.microsoft.com/v1.0/subscriptions
Content-Type: application/json

{
  "changeType": "updated",
  "notificationUrl": "https://webhook.azurewebsites.net/api/resourceNotifications",
  "resource": "/chats/{id}?notifyOnUserSpecificProperties=true",
  "includeResourceData": true,
  "encryptionCertificate": "{base64encodedCertificate}",
  "encryptionCertificateId": "{customId}",
  "expirationDateTime": "2024-04-22T11:00:00.0000000Z",
  "clientState": "{secretClientState}"
}

Subscribe to changes in any chat at user level (preview)

To get change notifications for all changes across all chats a particular user is part of, subscribe to /users/{user-id}/chats. This resource supports including resource data in the notification and providing the notifyOnUserSpecificProperties query string parameter in user context.

Permissions

Permission type Permissions (from least to most privileged)
Delegated (work or school account) Chat.ReadBasic, Chat.Read, Chat.ReadWrite
Delegated (personal Microsoft account) Not supported.
Application Chat.ReadBasic.All, Chat.Read.All, Chat.ReadWrite.All

Example 1: Subscribe to changes in user-level chats

The following example shows how to subscribe to receive notifications of changes across all chats a particular user is part of.

POST https://graph.microsoft.com/beta/subscriptions
Content-Type: application/json

{
  "changeType": "created,updated",
  "notificationUrl": "https://webhook.azurewebsites.net/api/resourceNotifications",
  "resource": "/users/456bbcdb-1e1c-4f3f-b7d0-ad7b9abcdefc/chats",
  "includeResourceData": true,
  "encryptionCertificate": "{base64encodedCertificate}",
  "encryptionCertificateId": "{customId}",
  "expirationDateTime": "2024-04-22T11:00:00.0000000Z",
  "clientState": "{secretClientState}"
}

Example 2: Subscribe to changes in user-level chats using the me path

The following example shows how to subscribe to receive notifications of changes across all chats the signed-in user is part of.

POST https://graph.microsoft.com/beta/subscriptions
Content-Type: application/json

{
  "changeType": "created,updated",
  "notificationUrl": "https://webhook.azurewebsites.net/api/resourceNotifications",
  "resource": "/me/chats",
  "includeResourceData": true,
  "encryptionCertificate": "{base64encodedCertificate}",
  "encryptionCertificateId": "{customId}",
  "expirationDateTime": "2024-04-22T11:00:00.0000000Z",
  "clientState": "{secretClientState}"
}

Example 3: Subscribe to changes in user-level chats using the notifyOnUserSpecificProperties query parameter

The following example shows how to subscribe to receive notifications of changes across all chats a particular user is part of by providing the notifyOnUserSpecificProperties query parameter.

POST https://graph.microsoft.com/beta/subscriptions
Content-Type: application/json

{
  "changeType": "created,updated",
  "notificationUrl": "https://webhook.azurewebsites.net/api/resourceNotifications",
  "resource": "/users/456bbcdb-1e1c-4f3f-b7d0-ad7b9abcdefc/chats?notifyOnUserSpecificProperties=true",
  "includeResourceData": true,
  "encryptionCertificate": "{base64encodedCertificate}",
  "encryptionCertificateId": "{customId}",
  "expirationDateTime": "2024-04-22T11:00:00.0000000Z",
  "clientState": "{secretClientState}"
}

Subscribe to changes in any chat in a tenant where a Teams app is installed

To get change notifications for all changes related to any chat in a tenant where a specific Teams app is installed, subscribe to /appCatalogs/teamsApps/{teams-app-id}/installedToChats. This resource supports including resource data in the notification.

Note: This API has licensing and payment requirements. It supports the model=B query parameter. If no model is specified, evaluation mode will be used.

Permissions

Permission type Permissions (from least to most privileged)
Delegated (work or school account) Not supported.
Delegated (personal Microsoft account) Not supported.
Application Chat.ReadBasic.WhereInstalled, Chat.Read.WhereInstalled, Chat.ReadWrite.WhereInstalled

Example

POST https://graph.microsoft.com/v1.0/subscriptions
Content-Type: application/json

{
  "changeType": "created,updated",
  "notificationUrl": "https://webhook.azurewebsites.net/api/resourceNotifications",
  "resource": "/appCatalogs/teamsApps/386bbcdb-1e1c-4f3f-b7d0-ad7b9ea6cf7c/installedToChats",
  "includeResourceData": true,
  "encryptionCertificate": "{base64encodedCertificate}",
  "encryptionCertificateId": "{customId}",
  "expirationDateTime": "2019-09-19T11:00:00.0000000Z",
  "clientState": "{secretClientState}"
}

Notification payloads

Notifications with resource data

For notifications with resource data, the payload looks like the following. This payload is for a property change in a chat.

{
    "value": [{
        "subscriptionId": "352887e3-9be0-4b6f-a4e6-dec118d857db",
        "changeType": "Created",
        "clientState": "<<--SpecifiedClientState-->>",
        "subscriptionExpirationDateTime": "2021-06-03T09:50:37.719033+00:00",
        "resource": "chats('19:1273a016-201d-4f95-8083-1b7f99b3edeb_976f4b31-fd01-4e0b-9178-29cc40c14438@unq.gbl.spaces')",
        "resourceData": {
            "id": "19:1273a016-201d-4f95-8083-1b7f99b3edeb_976f4b31-fd01-4e0b-9178-29cc40c14438@unq.gbl.spaces",
            "@odata.type": "#microsoft.graph.chat",
            "@odata.id": "chats('19:1273a016-201d-4f95-8083-1b7f99b3edeb_976f4b31-fd01-4e0b-9178-29cc40c14438@unq.gbl.spaces')"
        },
        "EncryptedContent": {
            "data": "<<--EncryptedContent-->>",
            "dataKey": "<<--EnryptedDataKeyUsedForEncryptingContent-->>",
            "encryptionCertificateId": "<<--IdOfTheCertificateUsedForEncryptingDataKey-->>",
            "encryptionCertificateThumbprint": "<<--ThumbprintOfTheCertificateUsedForEncryptingDataKey-->>"
        }
            "tenantId": "<<--TenantForWhichNotificationWasSent-->>"
        }],
    "validationTokens": ["<<--ValidationTokens-->>"]
}

For details about how to validate tokens and decrypt the payload, see Set up change notifications that include resource data.

The decrypted notification payload looks like the following. The payload conforms to the chats schema. The payload is similar to that returned by GET operations.

{
  "id": "19:1273a016-201d-4f95-8083-1b7f99b3edeb_976f4b31-fd01-4e0b-9178-29cc40c14438@unq.gbl.spaces",
  "topic": null,
  "createdDateTime": "2021-06-03T14:25:04+05:30",
  "lastUpdatedDateTime": "2021-06-03T14:25:04.387Z",
  "chatType": "oneOnOne",
  "webUrl": "https://teams.microsoft.com/l/chat/19%3A1273a016-201d-4f95-8083-1b7f99b3edeb_976f4b31-fd01-4e0b-9178-29cc40c14438%40unq.gbl.spaces/0?tenantId=27d53d29-3606-45dd-bc86-a532f3f38b8c",
  "tenantId": "2432b57b-0abd-43db-aa7b-16eadd115d34",
  "isHiddenForAllMembers": false,
  "lastMessagePreview": null,
  "onlineMeetingInfo": null,
  "members": [
    {
      "userId": "976f4b31-fd01-4e0b-9178-29cc40c14438",
      "email": null,
      "tenantId": "2432b57b-0abd-43db-aa7b-16eadd115d34",
      "id": "MCMjMjQzMmI1N2ItMGFiZC00M2RiLWFhN2ItMTZlYWRkMTE1ZDM0IyMxOToxMjczYTAxNi0yMDFkLTRmOTUtODA4My0xYjdmOTliM2VkZWJfOTc2ZjRiMzEtZmQwMS00ZTBiLTkxNzgtMjljYzQwYzE0NDM4QHVucS5nYmwuc3BhY2VzIyM5NzZmNGIzMS1mZDAxLTRlMGItOTE3OC0yOWNjNDBjMTQ0Mzg=",
      "roles": [],
      "displayName": null,
      "visibleHistoryStartDateTime": "1970-01-01T00:00:00Z",
      "user": null
    },
    {
      "userId": "ee723d3d-22d0-4394-9c32-5764d68f4672",
      "email": null,
      "tenantId": "2432b57b-0abd-43db-aa7b-16eadd115d34",
      "id": "MCMjMjQzMmI1N2ItMGFiZC00M2RiLWFhN2ItMTZlYWRkMTE1ZDM0IyMxOToxMjczYTAxNi0yMDFkLTRmOTUtODA4My0xYjdmOTliM2VkZWJfOTc2ZjRiMzEtZmQwMS00ZTBiLTkxNzgtMjljYzQwYzE0NDM4QHVucS5nYmwuc3BhY2VzIyNlZTcyM2QzZC0yMmQwLTQzOTQtOWMzMi01NzY0ZDY4ZjQ2NzI=",
      "roles": [],
      "displayName": null,
      "visibleHistoryStartDateTime": "1970-01-01T00:00:00Z",
      "user": null
    }
  ],
  "messages": [],
  "installedApps": [],
  "tabs": [],
  "permissionGrants": [],
  "operations": [],
  "assignedSensitivityLabel": null,
  "pinnedMessages": []
}

Notification payloads for user-specific properties

When you provide the query string parameter notifyOnUserSpecificProperties with value true during subscription creation, two types of payloads with different sets of information are sent to the subscriber. One type contains user-specific properties; the other doesn't contain user-specific properties.

Note: The query string parameter notifyOnUserSpecificProperties is supported only for chat subscriptions in user context, specifically for subscriptions to a particular chat or at the user level.

The following payload describes the information sent in a request for notifications that contain user-specific properties. The payload contains a subset of properties from the chat schema, including the viewpoint property with a non-null value, specific to the subscribing user. The omission of other properties from the chat schema doesn't imply any change in their values.

Note: When a user hides a chat in the Teams client, they receive a notification with isHidden: true in the viewpoint property; however, no notification with isHidden: false is sent when the chat becomes visible again after a new message arrives. To determine if the chat is no longer hidden, the subscriber must compare the lastMessageReadDateTime in the viewpoint property with the createdDateTime of the new message. If createdDateTime is later than the lastMessageReadDateTime, the chat is visible. The subscriber must have an active subscription to receive change notifications about messages in the chat to be notified of new messages in a hidden chat. When the user then opens the chat and reads the new message, a notification is sent with isHidden: false and an updated lastMessageReadDateTime in the viewpoint property.

{
  "id": "19:a1d516d162d441f38cd474916913c806@thread.v2",
  "topic": "Feature Crew",
  "createdDateTime": "2024-04-22T15:14:04.624Z",
  "lastUpdatedDateTime": "2024-04-23T14:37:53.87Z",
  "chatType": "group",
  "tenantId": "27d53d29-3606-45dd-bc86-a532f3f38b8c",
  "viewpoint": {
    "isHidden": false,
    "lastMessageReadDateTime": "2024-04-22T15:18:59.228Z"
  }
}

The following payload describes the information sent in a request for notifications that don't contain user-specific properties. The payload doesn't include the viewpoint property; however, this situation doesn't imply a change in its value for the user.

{
  "id": "19:2a81219665e6448da23022ddb949f693@thread.v2",
  "topic": "Group chat",
  "createdDateTime": "2024-04-22T15:02:57Z",
  "lastUpdatedDateTime": "2024-04-23T14:55:20.545Z",
  "chatType": "group",
  "webUrl": "https://teams.microsoft.com/l/chat/19%3A2a81219665e6448da23022ddb949f693%40thread.v2/0?tenantId=27d53d29-3606-45dd-bc86-a532f3f38b8c",
  "tenantId": "27d53d29-3606-45dd-bc86-a532f3f38b8c",
  "isHiddenForAllMembers": false,
  "lastMessagePreview": null,
  "onlineMeetingInfo": null,
  "members": [
    {
      "@odata.type": "#microsoft.graph.aadUserConversationMember",
      "userId": "4595d2f2-7b31-446c-84fd-9b795e63114b",
      "email": null,
      "tenantId": "27d53d29-3606-45dd-bc86-a532f3f38b8c",
      "id": "id",
      "roles": [
        "owner"
      ],
      "displayName": null,
      "visibleHistoryStartDateTime": "0001-01-01T00:00:00Z",
      "user": null
    },
    {
      "@odata.type": "#microsoft.graph.aadUserConversationMember",
      "userId": "7d898072-792c-4006-bb10-5ca9f2590649",
      "email": null,
      "tenantId": "27d53d29-3606-45dd-bc86-a532f3f38b8c",
      "id": "id",
      "roles": [
        "owner"
      ],
      "displayName": null,
      "visibleHistoryStartDateTime": "0001-01-01T00:00:00Z",
      "user": null
    },
    {
      "@odata.type": "#microsoft.graph.aadUserConversationMember",
      "userId": "c27c1b19-3904-4822-9813-4f6bdaab2eae",
      "email": null,
      "tenantId": "27d53d29-3606-45dd-bc86-a532f3f38b8c",
      "id": "id",
      "roles": [
        "owner"
      ],
      "displayName": null,
      "visibleHistoryStartDateTime": "0001-01-01T00:00:00Z",
      "user": null
    }
  ],
  "messages": [],
  "installedApps": [],
  "tabs": [],
  "permissionGrants": [],
  "operations": [],
  "assignedSensitivityLabel": null,
  "pinnedMessages": []
}

Notifications without resource data

The following decrypted payload describes the information sent in a request for notifications without resource data. This particular payload signifies that a new chat has been created.

{
  "subscriptionId": "8d85051d-779d-45bc-be92-e433f0a5d8ac",
  "changeType": "Created",
  "tenantId": "<<--TenantForWhichNotificationWasSent-->>",
  "clientState": "<<--SpecifiedClientState-->>",
  "subscriptionExpirationDateTime": "2021-06-03T10:26:09.8959595+00:00",
  "resource": "chats('19:1273a016-201d-4f95-8083-1b7f99b3edeb_976f4b31-fd01-4e0b-9178-29cc40c14438@unq.gbl.spaces')",
  "resourceData": {
    "id": "19:1273a016-201d-4f95-8083-1b7f99b3edeb_976f4b31-fd01-4e0b-9178-29cc40c14438@unq.gbl.spaces",
    "@odata.type": "#microsoft.graph.chat",
    "@odata.id": "chats('19:1273a016-201d-4f95-8083-1b7f99b3edeb_976f4b31-fd01-4e0b-9178-29cc40c14438@unq.gbl.spaces')"
  }
}

The resource and @odata.id properties can be used to make calls to Microsoft Graph to get the payload for the chat details. GET calls always return the current state of the chat details. If the chat details were updated between when the notification is sent and when the chat details are retrieved, the operation returns the updated chat details.

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