chatMessage: delta

Namespace: microsoft.graph

Important

APIs under the /beta version in Microsoft Graph are subject to change. Use of these APIs in production applications is not supported. To determine whether an API is available in v1.0, use the Version selector.

Get the list of messages from all chats in which a user is a participant, including one-on-one chats, group chats, and meeting chats. When you use delta query, you can obtain new or updated messages.

Note: Delta only returns messages within the last eight months. You can use GET /users/{id | user-principal-name}/chats/getAllMessages to retrieve older messages. Delta query supports both full synchronization that gets all the messages from all chats in which a user is a participant, and incremental synchronization that gets messages added or changed since the last synchronization. Typically, you do an initial full synchronization, and then get incremental changes to that messages view periodically.

To get the replies for a message, use the list message replies or the get message reply operations.

A GET request with the delta function returns one of the following:

• An @odata.nextLink that contains a URL with a delta function call and a skipToken.
• An @odata.deltaLink that contains a URL with a delta function call and a deltaToken.

State tokens are opaque to the client. To proceed with a round of change tracking, copy and apply the @odata.nextLink or @odata.deltaLink URL returned from the last GET request to the next delta function call. An @odata.deltaLink returned in a response signifies that the current round of change tracking is complete. You can save and use the @odata.deltaLink URL when you begin to retrieve more changes (messages changed or posted after you acquire @odata.deltaLink).

For more information, see the delta query documentation.

This API is available in the following national cloud deployments.

Global service	US Government L4	US Government L5 (DOD)	China operated by 21Vianet
✅	✅	✅	✅

Permissions

Choose the permission or permissions marked as least privileged for this API. Use a higher privileged permission or permissions only if your app requires it. For details about delegated and application permissions, see Permission types. To learn more about these permissions, see the permissions reference.

Permission type	Least privileged permissions	Higher privileged permissions
Delegated (work or school account)	Not supported.	Not supported.
Delegated (personal Microsoft account)	Not supported.	Not supported.
Application	Chat.Read.All	Chat.ReadWrite.All

HTTP request

GET /users/{id | user-principal-name}/chats/getAllMessages/delta

Query parameters

Tracking changes in messages incurs a round of one or more delta function calls. If you use any query parameter (other than $deltatoken and $skiptoken), you must specify it in the initial delta request. Microsoft Graph automatically encodes any specified parameters into the token portion of the @odata.nextLink or @odata.deltaLink URL provided in the response.

You only need to specify query parameters once.

In subsequent requests, copy and apply the @odata.nextLink or @odata.deltaLink URL from the previous response, as that URL already includes the encoded parameters.

Query parameter	Type	Description
$deltatoken	String	A state token returned in the @odata.deltaLink URL of the previous delta function call that indicates that the completion of that round of change tracking. Save and apply the entire @odata.deltaLink URL including this token in the first request of the next iteration of change tracking for that collection.
$skiptoken	String	A state token returned in the @odata.nextLink URL of the previous delta function call that indicates that further changes are available to be tracked.

Optional OData query parameters

This API supports the following OData query parameters:

• $top represents the maximum number of messages to fetch in a call. The upper limit is 50.
• $skip represents how many messages to skip at the beginning of the list.
• $filter returns messages that meet a certain criteria. The only property that supports filters is lastModifiedDateTime, and only the gtoperator is supported. For example,../messages/delta?$filter=lastModifiedDateTime gt 2024-08-27T07:13:28.000z` fetches any message created or changed after the specified date and time.

Request headers

Header	Value
Authorization	Bearer {token}. Required. Learn more about authentication and authorization.

Request Body

Don't supply a request body for this method.

Response

If successful, this method returns a 200 OK response code and a collection of chatMessage objects in the response body. The response also includes an @odata.nextLink URL or an @odata.deltaLink URL.

Examples

Example 1: Initial synchronization

The following example shows a series of three requests to synchronize the messages. The response consists of three messages:

• Step 1: initial request and response.
• Step 2: second request and response
• Step 3: third request and final response.

For brevity, the sample responses show only a subset of the properties for a message. In an actual call, most message properties are returned.

See also what you can do in the next round to get more messages.

Initial request

In this example, the chat messages synchronize for the first time and the initial sync request doesn't include any state token.

The request specifies the optional $top query parameter that returns two messages at a time.

HTTP

GET https://graph.microsoft.com/beta/users/5ed12dd6-24f8-4777-be3d-0d234e06cefa/chats/getAllMessages/delta?$top=2

JavaScript

const options = {
	authProvider,
};

const client = Client.init(options);

let delta = await client.api('/users/5ed12dd6-24f8-4777-be3d-0d234e06cefa/chats/getAllMessages/delta')
	.version('beta')
	.top(2)
	.get();

Important

Microsoft Graph SDKs use the v1.0 version of the API by default, and do not support all the types, properties, and APIs available in the beta version. For details about accessing the beta API with the SDK, see Use the Microsoft Graph SDKs with the beta API.

For details about how to add the SDK to your project and create an authProvider instance, see the SDK documentation.

Initial request response

The response includes two messages and an @odata.nextLink response header with a skipToken. The @odata.nextLink URL indicates that more messages in the chats are available to retrieve.

HTTP/1.1 200 OK
Content-type: application/json

{
  "@odata.context": "https://graph.microsoft.com/beta/$metadata#Collection(microsoft.graph.chatMessage)",
  "@odata.nextLink": "https://graph.microsoft.com/beta/users/5ed12dd6-24f8-4777-be3d-0d234e06cefa/chats/getAllMessages/delta?$skiptoken=a-5fqdzHFr_L_cc7C0q1F-HCB8Z9SjwOsMN37XV5yfSnYgK4jVGVGEl25GFlxKWq0Wv6quL-5qcNg4nUnxzof6namZ_DM5no-hcL515cSrRGDoRLn38fZE1AXoDugSTOohOq3YRCYLqJbFGIoovMPTar32oLuoltHixme-Bf1lZtscv1wv5uu-MtkpYZIT0uDw-umQUK7mLNjMcyhNaifDrdemGUDMaQ25_QuHukNbkXcxsKMJdJ288p9IkaSeEyJHX5a6T_kEdAmuffsdzOGY8mLbLc7VEsUL75rGdt2aiKkywaPHsT9bDGV7MBo7WM2g_kdPeLdRPSdSxxhkGpNA.y_WMscy7negz0HZPhgjH-YyzsdeXzr2UDSfNrdzC78A",
  "value": [
    {
      "replyToId": null,
      "etag": "1727366299993",
      "messageType": "message",
      "createdDateTime": "2024-09-26T15:58:19.993Z",
      "lastModifiedDateTime": "2024-09-26T15:58:19.993Z",
      "lastEditedDateTime": null,
      "deletedDateTime": null,
      "subject": "",
      "summary": null,
      "chatId": "19:65a44130a0f249359d77858287ed39f0@thread.v2",
      "importance": "normal",
      "locale": "en-us",
      "webUrl": null,
      "channelIdentity": null,
      "policyViolation": null,
      "eventDetail": null,
      "id": "1727366299993",
      "from": {
        "application": null,
        "device": null,
        "user": {
          "@odata.type": "#microsoft.graph.teamworkUserIdentity",
          "id": "43383bf2-f7ab-4ba3-bf5e-12d071db189b",
          "displayName": "CFCC5",
          "userIdentityType": "aadUser",
          "tenantId": "f54e6700-e876-410b-8996-d6447d64098a"
        }
      },
      "body": {
        "contentType": "html",
        "content": "<div>\n<div itemprop=\"copy-paste-block\">reply 9&nbsp;to new conv</div>\n</div>"
      },
      "attachments": [],
      "mentions": [],
      "reactions": []
    },
    {
      "replyToId": null,
      "etag": "1727216579286",
      "messageType": "message",
      "createdDateTime": "2024-09-24T22:22:59.286Z",
      "lastModifiedDateTime": "2024-09-24T22:22:59.286Z",
      "lastEditedDateTime": null,
      "deletedDateTime": null,
      "subject": "",
      "summary": null,
      "chatId": "19:2a247d5dadc24f408d009e4ae84502cf@thread.v2",
      "importance": "normal",
      "locale": "en-us",
      "webUrl": null,
      "channelIdentity": null,
      "policyViolation": null,
      "eventDetail": null,
      "id": "1727216579286",
      "from": {
        "application": null,
        "device": null,
        "user": {
          "@odata.type": "#microsoft.graph.teamworkUserIdentity",
          "id": "43383bf2-f7ab-4ba3-bf5e-12d071db189b",
          "displayName": "CFCC5",
          "userIdentityType": "aadUser",
          "tenantId": "f54e6700-e876-410b-8996-d6447d64098a"
        }
      },
      "body": {
        "contentType": "html",
        "content": "<div>\n<div itemprop=\"copy-paste-block\">reply 10 to new conv</div>\n</div>"
      },
      "attachments": [],
      "mentions": [],
      "reactions": []
    }
  ]
}

Second request

The second request specifies the @odata.nextLink URL returned from the previous response. Notice that it no longer has to specify the same $top parameter as in the initial request, as the skipToken in the @odata.nextLink URL encodes and includes those parameters.

HTTP

GET https://graph.microsoft.com/beta/users/5ed12dd6-24f8-4777-be3d-0d234e06cefa/chats/getAllMessages/delta?&%24skiptoken=a-5fqdzHFr_L_cc7C0q1F-HCB8Z9SjwOsMN37XV5yfSnYgK4jVGVGEl25GFlxKWq0Wv6quL-5qcNg4nUnxzof6namZ_DM5no-hcL515cSrRGDoRLn38fZE1AXoDugSTOohOq3YRCYLqJbFGIoovMPTar32oLuoltHixme-Bf1lZtscv1wv5uu-MtkpYZIT0uDw-umQUK7mLNjMcyhNaifMIVTT-htmEOClLVwgcyWLR-sl9Qb73uTTtPXdFdMK6FDE4gpwvvKxvo2ChsW2c4eo77LDh6ZL_WQ8Luq00koQ6vHIrLBHPMUdOAxDxu-U7N7H4hsFn9aRDRdwRky7067A.V2a-J-86yXTd9SJMA4CHP6enI-Ab-bQzRgYujwsIwDo

JavaScript

const options = {
	authProvider,
};

const client = Client.init(options);

let delta = await client.api('/users/5ed12dd6-24f8-4777-be3d-0d234e06cefa/chats/getAllMessages/delta')
	.version('beta')
	.skiptoken('a-5fqdzHFr_L_cc7C0q1F-HCB8Z9SjwOsMN37XV5yfSnYgK4jVGVGEl25GFlxKWq0Wv6quL-5qcNg4nUnxzof6namZ_DM5no-hcL515cSrRGDoRLn38fZE1AXoDugSTOohOq3YRCYLqJbFGIoovMPTar32oLuoltHixme-Bf1lZtscv1wv5uu-MtkpYZIT0uDw-umQUK7mLNjMcyhNaifMIVTT-htmEOClLVwgcyWLR-sl9Qb73uTTtPXdFdMK6FDE4gpwvvKxvo2ChsW2c4eo77LDh6ZL_WQ8Luq00koQ6vHIrLBHPMUdOAxDxu-U7N7H4hsFn9aRDRdwRky7067A.V2a-J-86yXTd9SJMA4CHP6enI-Ab-bQzRgYujwsIwDo')
	.get();

Important

Microsoft Graph SDKs use the v1.0 version of the API by default, and do not support all the types, properties, and APIs available in the beta version. For details about accessing the beta API with the SDK, see Use the Microsoft Graph SDKs with the beta API.

For details about how to add the SDK to your project and create an authProvider instance, see the SDK documentation.

Second request response

The second response returns the next two messages and an @odata.nextLink response header with a skipToken that indicates that more messages are available to retrieve.

HTTP/1.1 200 OK
Content-type: application/json

{
  "@odata.context": "https://graph.microsoft.com/beta/$metadata#Collection(microsoft.graph.chatMessage)",
  "@odata.nextLink": "https://graph.microsoft.com/beta/users/5ed12dd6-24f8-4777-be3d-0d234e06cefa/chats/getAllMessages/delta?$skiptoken=yJQeoV00BlfhYsCMsrn1GnNz7v5S39NShp1U4rzLZnPsraIATwnnsvbdv52hvKp7AAG-Bcwdu7dA7UweXHvGYQ2M5eysh-cNz6EZICZp7kM9HtmQHu7JU-_sX5S1edvEQxyAgm1R2HXk4R9_TWn9ZAu1BRQ-elS9hg0f8BlwKLCIluuSPS2ZuNVnQTOOYMMpmzKGX4wVVQUv0UlrIFZIPWTeriNpg5sJFd91n2GHSMnS7WaRTh3NSmvJE08ww-2CjGml2RjPyHfLHSqywuNt5BGNVj_vqsLbjetdDIYZFa_yaQqV_Bp5DaWM_nXD8RjVULH7H4ATXoUiG3Etsd_Nhd_GIYoxV6x2_rmbh928WPGSsenCOa352tyFxmuyTH0ozDmU4onVbGnOBQEYJDKZjuIeNVW-E19VHthjZ9GvYGE.NHJkfAbRu3Qoozl699AinriiHvWofLVnWkB5wEJmZlk",
  "value": [
    {
      "replyToId": null,
      "etag": "1726706286844",
      "messageType": "message",
      "createdDateTime": "2024-09-19T00:38:06.844Z",
      "lastModifiedDateTime": "2024-09-19T00:38:06.844Z",
      "lastEditedDateTime": null,
      "deletedDateTime": null,
      "subject": "",
      "summary": null,
      "chatId": "19:65a44130a0f249359d77858287ed39f0@thread.v2",
      "importance": "normal",
      "locale": "en-us",
      "webUrl": null,
      "channelIdentity": null,
      "policyViolation": null,
      "eventDetail": null,
      "id": "1726706286844",
      "from": {
        "application": null,
        "device": null,
        "user": {
          "@odata.type": "#microsoft.graph.teamworkUserIdentity",
          "id": "43383bf2-f7ab-4ba3-bf5e-12d071db189b",
          "displayName": "CFCC5",
          "userIdentityType": "aadUser",
          "tenantId": "f54e6700-e876-410b-8996-d6447d64098a"
        }
      },
      "body": {
        "contentType": "html",
        "content": "<p>Not one message, but several combined together to give you the full picture</p>"
      },
      "attachments": [],
      "mentions": [],
      "reactions": []
    },
    {
      "replyToId": null,
      "etag": "1726706276201",
      "messageType": "message",
      "createdDateTime": "2024-09-19T00:37:56.201Z",
      "lastModifiedDateTime": "2024-09-19T00:37:56.201Z",
      "lastEditedDateTime": null,
      "deletedDateTime": null,
      "subject": "",
      "summary": null,
      "chatId": "19:65a44130a0f249359d77858287ed39f0@thread.v2",
      "importance": "normal",
      "locale": "en-us",
      "webUrl": null,
      "channelIdentity": null,
      "policyViolation": null,
      "eventDetail": null,
      "id": "1726706276201",
      "from": {
        "application": null,
        "device": null,
        "user": {
          "@odata.type": "#microsoft.graph.teamworkUserIdentity",
          "id": "43383bf2-f7ab-4ba3-bf5e-12d071db189b",
          "displayName": "CFCC5",
          "userIdentityType": "aadUser",
          "tenantId": "f54e6700-e876-410b-8996-d6447d64098a"
        }
      },
      "body": {
        "contentType": "html",
        "content": "<p>Dive into the possibilities of incorporating context into ML evaluations by looking at entire conversations</p>"
      },
      "attachments": [],
      "mentions": [],
      "reactions": []
    }
  ]
}

Third request

The third request continues to use the latest @odata.nextLink returned from the last sync request.

HTTP

GET  https://graph.microsoft.com/beta/users/5ed12dd6-24f8-4777-be3d-0d234e06cefa/chats/getAllMessages/delta?$skiptoken=8UusBixEHS9UUau6uGcryrA6FpnWwMJbuTYILM1PArHxnZzDVcsHQrijNzCyIVeEauMQsKUfMhNjLWFs1o4sBS_LofJ7xMftZUfec_pijuT6cAk5ugcWCca9RCjK7iVj.DKZ9w4bX9vCR7Sj9P0_qxjLAAPiEZgxlOxxmCLMzHJ4

JavaScript

const options = {
	authProvider,
};

const client = Client.init(options);

let delta = await client.api('/users/5ed12dd6-24f8-4777-be3d-0d234e06cefa/chats/getAllMessages/delta')
	.version('beta')
	.skiptoken('8UusBixEHS9UUau6uGcryrA6FpnWwMJbuTYILM1PArHxnZzDVcsHQrijNzCyIVeEauMQsKUfMhNjLWFs1o4sBS_LofJ7xMftZUfec_pijuT6cAk5ugcWCca9RCjK7iVj.DKZ9w4bX9vCR7Sj9P0_qxjLAAPiEZgxlOxxmCLMzHJ4')
	.get();

Important

Microsoft Graph SDKs use the v1.0 version of the API by default, and do not support all the types, properties, and APIs available in the beta version. For details about accessing the beta API with the SDK, see Use the Microsoft Graph SDKs with the beta API.

For details about how to add the SDK to your project and create an authProvider instance, see the SDK documentation.

Third request response

The third response returns the only remaining messages and an @odata.deltaLink response header with a deltaToken which indicates that all messages are returned. Save and use the @odata.deltaLink URL to query for any new messages added or changed from this point onwards.

HTTP/1.1 200 OK
Content-type: application/json

{
  "@odata.context": "https://graph.microsoft.com/beta/$metadata#Collection(microsoft.graph.chatMessage)",
  "@odata.deltaLink": "https://graph.microsoft.com/beta/users/5ed12dd6-24f8-4777-be3d-0d234e06cefa/chats/getAllMessages/delta?$deltatoken=aQdvS1VwGCSRxVmZJqykmDik_JIC44iCZpv-GLiA2VnFuE5yG-kCEBROb2iaPT_y_eMWVQtBO_ejzzyIxl00ji-tQ3HzAbW4liZAVG88lO3nG_6-MBFoHY1n8y21YUzjocG-Cn1tCNeeLPLTzIe5Dw.EP9gLiCoF2CE_e6l_m1bTk2aokD9KcgfgfcLGqd1r_4",
  "value": [
    {
      "replyToId": null,
      "etag": "1726706340932",
      "messageType": "message",
      "createdDateTime": "2024-09-19T00:39:00.932Z",
      "lastModifiedDateTime": "2024-09-19T00:39:00.932Z",
      "lastEditedDateTime": null,
      "deletedDateTime": null,
      "subject": "",
      "summary": null,
      "chatId": "19:65a44130a0f249359d77858287ed39f0@thread.v2",
      "importance": "normal",
      "locale": "en-us",
      "webUrl": null,
      "channelIdentity": null,
      "policyViolation": null,
      "eventDetail": null,
      "id": "1726706340932",
      "from": {
        "application": null,
        "device": null,
        "user": {
          "@odata.type": "#microsoft.graph.teamworkUserIdentity",
          "id": "43383bf2-f7ab-4ba3-bf5e-12d071db189b",
          "displayName": "CFCC5",
          "userIdentityType": "aadUser",
          "tenantId": "f54e6700-e876-410b-8996-d6447d64098a"
        }
      },
      "body": {
        "contentType": "html",
        "content": "<p>let's get started!</p>"
      },
      "attachments": [],
      "mentions": [],
      "reactions": []
    }
  ]
}

Example 2: The next round to get more messages

Using the @odata.deltaLink from the last request in the last round, you can get only those messages that changed (added or updated) since the @odata.deltaLink was acquired. Your request should look like the following, assuming you want to keep the same maximum page size in the response.

Request

The following example shows a request.

HTTP

GET https://graph.microsoft.com/beta/users/5ed12dd6-24f8-4777-be3d-0d234e06cefa/chats/getAllMessages/delta?$deltatoken=aQdvS1VwGCSRxVmZJqykmDik_JIC44iCZpv-GLiA2VnFuE5yG-kCEBROb2iaPT_y_eMWVQtBO_ejzzyIxl00ji-tQ3HzAbW4liZAVG88lO3nG_6-MBFoHY1n8y21YUzjocG-Cn1tCNeeLPLTzIe5Dw.EP9gLiCoF2CE_e6l_m1bTk2aokD9KcgfgfcLGqd1r_4

JavaScript

const options = {
	authProvider,
};

const client = Client.init(options);

let delta = await client.api('/users/5ed12dd6-24f8-4777-be3d-0d234e06cefa/chats/getAllMessages/delta')
	.version('beta')
	.get();

Important

Microsoft Graph SDKs use the v1.0 version of the API by default, and do not support all the types, properties, and APIs available in the beta version. For details about accessing the beta API with the SDK, see Use the Microsoft Graph SDKs with the beta API.

For details about how to add the SDK to your project and create an authProvider instance, see the SDK documentation.

Response

The following example shows the response.

Note: The response object shown here might be shortened for readability.

HTTP/1.1 200 OK
Content-type: application/json

{
  "@odata.context": "https://graph.microsoft.com/beta/$metadata#Collection(chatMessage)",
  "@odata.deltaLink": "https://graph.microsoft.com/beta/users/5ed12dd6-24f8-4777-be3d-0d234e06cefa/chats/getAllMessages/delta?$deltatoken=aQdvS1VwGCSRxVmZJqykmDik_JIC44iCZpv-GLiA2VnFuE5yG-kCEBROb2iaPT_yjz2nsMoh1gXNtXii7s78HapCi5woifXqwXlVNxICh8wUUnvE2gExsa8eZ2Vy_ch5rVIhm067_1mUPML3iYUVyg.3o0rhgaBUduuxOr98An5pjBDP5JjKUiVWku3flSiOsk",
  "value": [
    {
      "replyToId": null,
      "etag": "1727366299999",
      "messageType": "message",
      "createdDateTime": "2024-09-26T15:58:19.993Z",
      "lastModifiedDateTime": "2024-09-26T17:58:19.993Z",
      "lastEditedDateTime": null,
      "deletedDateTime": null,
      "subject": "",
      "summary": null,
      "chatId": "19:65a44130a0f249359d77858287ed39f0@thread.v2",
      "importance": "normal",
      "locale": "en-us",
      "webUrl": null,
      "channelIdentity": null,
      "policyViolation": null,
      "eventDetail": null,
      "id": "1727366299999",
      "from": {
        "application": null,
        "device": null,
        "user": {
          "@odata.type": "#microsoft.graph.teamworkUserIdentity",
          "id": "43383bf2-f7ab-4ba3-bf5e-12d071db189b",
          "displayName": "CFCC5",
          "userIdentityType": "aadUser",
          "tenantId": "f54e6700-e876-410b-8996-d6447d64098a"
        }
      },
      "body": {
        "contentType": "html",
        "content": "newly added content"
      },
      "attachments": [],
      "mentions": [],
      "reactions": []
    }
  ]
}