How to send a message to a channel of MS Team using Graph API - microsoft-teams

Question

How to send a message to a channel of MS Team using Graph APÌ?
I have used below commands to generate token for grant_type client_credentials.
curl --location --request POST 'https://login.microsoftonline.com/{tenant_ID}/oauth2/v2.0/token' --header 'Content-Type: application/x-www-form-urlencoded' --data-urlencode 'grant_type=client_credentials' --data-urlencode 'client_id={client_id}' --data-urlencode 'client_secret={client_secret}' --data-urlencode 'scope=https://graph.microsoft.com/.default'
Then using token generated i ran following curl command to get list of channels and it run successfully.
curl --location --request GET 'https://graph.microsoft.com/v1.0/teams/{team_ID}/channels/' \
--header 'Authorization: Bearer eyJ0eXAiOiJKV1QiLCJub25jZSI6IjBMa0VQY1V4RjgxWnJOTnlUb2Z1SUFRc2VEVUYwQ25wa3pPcWFiY2wwcjgiLCJhbGciOiJSUzI1NiIsIng1dCI6ImtnMkxZczJUMENUaklmajRydDZKSXluZW4zOCIsImtpZCI6ImtnMkxZczJUMENUaklmajRydDZKSXluZW4zOCJ9.{"aud":"https://graph.microsoft.com","iss":"https://sts.windows.net/e86bf821-d6ea-4510-8ffb-7c686c6457f2/","iat":1605355489,"nbf":1605355489,"exp":1605359389,"aio":"E2RgYOC6vuaX7p0sk7Zc4bmn66cwAgA=","app_displayname":"fxtest","appid":"efad3f9a-f82d-4cd1-9915-20404b466f37","appidacr":"1","idp":"https://sts.windows.net/e86bf821-d6ea-4510-8ffb-7c686c6457f2/","idtyp":"app","oid":"76fd03ae-1701-4abe-b2b6-b04efedaae85","rh":"0.AAAAIfhr6OrWEEWP-3xobGRX8po_re8t-NFMmRUgQEtGbzdTAAA.","roles":["TeamSettings.ReadWrite.All","TeamMember.Read.All","Place.Read.All","Chat.UpdatePolicyViolation.All","IdentityUserFlow.ReadWrite.All","Schedule.ReadWrite.All","Policy.Read.ConditionalAccess","TeamsAppInstallation.ReadForUser.All","UserShiftPreferences.Read.All","Teamwork.Migrate.All","Calls.JoinGroupCall.All","EduRoster.Read.All","Policy.ReadWrite.PermissionGrant","DeviceManagementManagedDevices.Read.All","OnlineMeetings.Read.All","AccessReview.ReadWrite.Membership","Device.Read.All","Policy.ReadWrite.ConditionalAccess","BitlockerKey.ReadBasic.All","TeamsTab.Read.All","Policy.ReadWrite.AuthenticationMethod","ApprovalRequest.ReadWrite.CustomerLockbox","UserAuthenticationMethod.Read.All","TeamsActivity.Read.All","BitlockerKey.Read.All","TeamsApp.Read.All","TeamMember.ReadWriteNonOwnerRole.All","Mail.ReadWrite","Printer.Read.All","IdentityRiskEvent.ReadWrite.All","OrgContact.Read.All","TeamsAppInstallation.ReadForChat.All","OnlineMeetings.ReadWrite.All","Device.ReadWrite.All","Policy.Read.PermissionGrant","Channel.Delete.All","User.ReadWrite.All","Policy.ReadWrite.AuthenticationFlows","Domain.ReadWrite.All","Application.ReadWrite.OwnedBy","Printer.ReadWrite.All","SecurityActions.ReadWrite.All","ChannelSettings.Read.All","SecurityEvents.Read.All","TeamsTab.Create","UserAuthenticationMethod.ReadWrite.All","DelegatedPermissionGrant.ReadWrite.All","Calendars.Read","Mail.ReadBasic.All","PrivilegedAccess.Read.AzureAD","PrintJob.Manage.All","RoleManagement.Read.Directory","Policy.ReadWrite.ApplicationConfiguration","EduAssignments.ReadWrite.All","Channel.ReadBasic.All","ShortNotes.ReadWrite.All","People.Read.All","TeamsAppInstallation.ReadWriteSelfForUser.All","Application.ReadWrite.All","Calls.InitiateGroupCall.All","Group.Read.All","AdministrativeUnit.Read.All","PrintJob.ReadWriteBasic.All","TeamsAppInstallation.ReadWriteSelfForChat.All","AccessReview.ReadWrite.All","OnPremisesPublishingProfiles.ReadWrite.All","Directory.ReadWrite.All","TeamsActivity.Send","TeamsTab.ReadWrite.All","IdentityRiskyUser.ReadWrite.All","EduAssignments.ReadWriteBasic.All","MailboxSettings.Read","EduAdministration.Read.All","Calls.JoinGroupCallAsGuest.All","ThreatIndicators.ReadWrite.OwnedBy","TeamsAppInstallation.ReadWriteSelfForTeam.All","Sites.Read.All","PrintJob.Read.All","DeviceManagementServiceConfig.Read.All","Sites.ReadWrite.All","ServiceMessage.Read.All","Contacts.ReadWrite","Team.Create","ApprovalRequest.ReadWrite.AdminConsentRequest","Group.Create","Group.ReadWrite.All","TeamsApp.ReadWrite.All","Sites.Manage.All","SecurityEvents.ReadWrite.All","Notes.Read.All","PrintJob.ReadWrite.All","EntitlementManagement.Read.All","CallRecords.Read.All","IdentityUserFlow.Read.All","User.Invite.All","ChatMessage.Read.All","EduRoster.ReadWrite.All","Files.ReadWrite.All","Directory.Read.All","RoleManagement.Read.All","CallRecord-PstnCalls.Read.All","PrivilegedAccess.Read.AzureResources","User.Read.All","ApprovalRequest.Read.AdminConsentRequest","Domain.Read.All","EduAssignments.ReadBasic.All","EduRoster.ReadBasic.All","ChannelMember.Read.All","Schedule.Read.All","TeamsAppInstallation.ReadWriteForUser.All","DeviceManagementServiceConfig.ReadWrite.All","UserNotification.ReadWrite.CreatedByApp","GroupMember.Read.All","TeamMember.ReadWrite.All","ApprovalRequest.Read.CustomerLockbox","UserShiftPreferences.ReadWrite.All","DeviceManagementRBAC.Read.All","TrustFrameworkKeySet.ReadWrite.All","IdentityProvider.ReadWrite.All","Files.Read.All","EntitlementManagement.ReadWrite.All","Organization.ReadWrite.All","DeviceManagementConfiguration.Read.All","Team.ReadBasic.All","PrintTaskDefinition.ReadWrite.All","Mail.Read","AppRoleAssignment.ReadWrite.All","Chat.Read.All","DeviceManagementManagedDevices.ReadWrite.All","ChannelMessage.Read.All","PrivilegedAccess.ReadWrite.AzureAD","User.Export.All","EduAssignments.Read.All","SecurityActions.Read.All","TeamsAppInstallation.ReadWriteForTeam.All","ThreatAssessment.Read.All","IdentityProvider.Read.All","PrivilegedAccess.ReadWrite.AzureResources","TeamSettings.Read.All","Calendars.ReadWrite","IdentityRiskyUser.Read.All","AccessReview.Read.All","TermStore.Read.All","EduAdministration.ReadWrite.All","Mail.Send","ApprovalRequest.ReadWrite.PriviligedAccess","PrivilegedAccess.Read.AzureADGroup","Chat.ReadWrite.All","ApprovalRequest.ReadWrite.EntitlementManagement","User.ManageIdentities.All","InformationProtectionPolicy.Read.All","ChannelMessage.UpdatePolicyViolation.All","MailboxSettings.ReadWrite","Organization.Read.All","ChannelMember.ReadWrite.All","RoleManagement.ReadWrite.Directory","GroupMember.ReadWrite.All","Contacts.Read","IdentityRiskEvent.Read.All","Mail.ReadBasic","ChannelSettings.ReadWrite.All","AdministrativeUnit.ReadWrite.All","AuditLog.Read.All","Channel.Create","Policy.Read.All","TermStore.ReadWrite.All","ApprovalRequest.Read.PriviligedAccess","Member.Read.Hidden","DeviceManagementConfiguration.ReadWrite.All","Chat.ReadBasic.All","Calls.AccessMedia.All","Application.Read.All","ProgramControl.Read.All","DeviceManagementManagedDevices.PrivilegedOperations.All","ServiceHealth.Read.All","TeamsAppInstallation.ReadWriteForChat.All","Sites.FullControl.All","Policy.ReadWrite.Authorization","DeviceManagementApps.ReadWrite.All","DeviceManagementApps.Read.All","ThreatIndicators.Read.All","TeamsAppInstallation.ReadForTeam.All","ShortNotes.Read.All","ProgramControl.ReadWrite.All","Reports.Read.All","PrintJob.ReadBasic.All","Calls.Initiate.All","ExternalItem.ReadWrite.All","Notes.ReadWrite.All","ApprovalRequest.Read.EntitlementManagement","DeviceManagementRBAC.ReadWrite.All","TrustFrameworkKeySet.Read.All","Policy.ReadWrite.FeatureRollout","Policy.ReadWrite.TrustFramework","PrivilegedAccess.ReadWrite.AzureADGroup"],"sub":"76fd03ae-1701-4abe-b2b6-b04efedaae85","tenant_region_scope":"AS","tid":"e86bf821-d6ea-4510-8ffb-7c686c6457f2","uti":"TPz9nCo5O0Sj6GaXh6oXAA","ver":"1.0","xms_tcdt":1594628256}.NyL_Pf26Xq7ciHP241A8hSxqj2pqgLJSGfGngBdauAmHeFCbxxPQJPGN1OgyFqn_RS5flIgFAtqDU7bEJhuVemYWhngi2Yj-Yu3FCptFwWhpIHp03IeChbjX1CVIR1ESHuCFiH_EQSXAdk9spPB8iW8Yzp5q2gwVwWhxQgbdixXZ-lzT6f6TTBCQqkPkazMFwUxEHQtDXEQfYjdNu5V3W4in1PM5I4EKdo_tw7H4qMG4aImCGtVnX4P_jVEHPkk_8888glqPLmABpd7P6PGxnyirSFox60UFYT2ISe2Xqh5MwE0fGUyEKc_-0MHubmVfm6qbnz_TiZAYqiteZVwmSg'
Below is the response
{
"#odata.context": "https://graph.microsoft.com/v1.0/$metadata#teams('e76f9b0b')/channels",
"#odata.count": 3,
"value": [
{
"id": "19:d893c#thread.tacv2",
"displayName": "General",
"description": null,
"isFavoriteByDefault": null,
"email": "",
"webUrl": "https://teams.microsoft.com/l/channel/19%3a%40thread.tacv2/General?groupId=e76f9b0b-b6d3&tenantId=e86bf",
"membershipType": "standard"
},
{
"id": "19:44e0b#thread.tacv2",
"displayName": "apiSec-Issues",
"description": null,
"isFavoriteByDefault": null,
"email": "",
"webUrl": "https://teams.microsoft.com/l/channel/19%3b0b%40thread.tacv2/apiSec-Issues?groupId=e76f9b0b-b6d3&tenantId=e86bf821-d6ea-4510",
"membershipType": "standard"
},
{
"id": "19:721251965a30#thread.tacv2",
"displayName": "Dev",
"description": "This channel is where we debate all future development plans",
"isFavoriteByDefault": null,
"email": "",
"webUrl": "https://teams.microsoft.com/l/channel/19%330%40thread.tacv2/Dev?groupId=e76f9b0b-b6d3-42bb-baf1-6a798e4&tenantId=e86bf821-d6ea-4510-8ffb-7c686c64",
"membershipType": "standard"
}
]
}
However it throws unauthorized error when tried to post/sent a message to a channel using token generated from above mention curl command
curl --location --request POST 'https://graph.microsoft.com/v1.0/teams/{team_ID}/channels/{channel_ID}/messages/' \
--header 'Content-Type: application/json' \
--header 'Authorization: Bearer eyJ0eXAiOiJKV1QiLCJub25jZSI6IlRiYnhpOWlNZWZaTUZOaDNhNERIVDdlakNheU5QR1V2X3RhYzdwM3hxMVEiLCJhbGciOiJSUzI1NiIsIng1dCI6ImtnMkxZczJUMENUaklmajRydDZKSXluZW4zOCIsImtpZCI6ImtnMkxZczJUMENUaklmajRydDZKSXluZW4zOCJ9.{"aud":"https://graph.microsoft.com","iss":"https://sts.windows.net/e86bf821-d6ea-4510-8ffb-7c686c6457f2/","iat":1605358068,"nbf":1605358068,"exp":1605361968,"aio":"E2RgYPDqdKh9zCufULbIV0Mv4iY3AA==","app_displayname":"fxtest","appid":"efad3f9a-f82d-4cd1-9915-20404b466f37","appidacr":"1","idp":"https://sts.windows.net/e86bf821-d6ea-4510-8ffb-7c686c6457f2/","idtyp":"app","oid":"76fd03ae-1701-4abe-b2b6-b04efedaae85","rh":"0.AAAAIfhr6OrWEEWP-3xobGRX8po_re8t-NFMmRUgQEtGbzdTAAA.","roles":["TeamSettings.ReadWrite.All","TeamMember.Read.All","Place.Read.All","Chat.UpdatePolicyViolation.All","IdentityUserFlow.ReadWrite.All","Schedule.ReadWrite.All","Policy.Read.ConditionalAccess","TeamsAppInstallation.ReadForUser.All","UserShiftPreferences.Read.All","Teamwork.Migrate.All","Calls.JoinGroupCall.All","EduRoster.Read.All","Policy.ReadWrite.PermissionGrant","DeviceManagementManagedDevices.Read.All","OnlineMeetings.Read.All","AccessReview.ReadWrite.Membership","Device.Read.All","Policy.ReadWrite.ConditionalAccess","BitlockerKey.ReadBasic.All","TeamsTab.Read.All","Policy.ReadWrite.AuthenticationMethod","ApprovalRequest.ReadWrite.CustomerLockbox","UserAuthenticationMethod.Read.All","TeamsActivity.Read.All","BitlockerKey.Read.All","TeamsApp.Read.All","TeamMember.ReadWriteNonOwnerRole.All","Mail.ReadWrite","Printer.Read.All","IdentityRiskEvent.ReadWrite.All","OrgContact.Read.All","TeamsAppInstallation.ReadForChat.All","OnlineMeetings.ReadWrite.All","Device.ReadWrite.All","Policy.Read.PermissionGrant","Channel.Delete.All","User.ReadWrite.All","Policy.ReadWrite.AuthenticationFlows","Domain.ReadWrite.All","Application.ReadWrite.OwnedBy","Printer.ReadWrite.All","SecurityActions.ReadWrite.All","ChannelSettings.Read.All","SecurityEvents.Read.All","TeamsTab.Create","UserAuthenticationMethod.ReadWrite.All","DelegatedPermissionGrant.ReadWrite.All","Calendars.Read","Mail.ReadBasic.All","PrivilegedAccess.Read.AzureAD","PrintJob.Manage.All","RoleManagement.Read.Directory","Policy.ReadWrite.ApplicationConfiguration","EduAssignments.ReadWrite.All","Channel.ReadBasic.All","ShortNotes.ReadWrite.All","People.Read.All","TeamsAppInstallation.ReadWriteSelfForUser.All","Application.ReadWrite.All","Calls.InitiateGroupCall.All","Group.Read.All","AdministrativeUnit.Read.All","PrintJob.ReadWriteBasic.All","TeamsAppInstallation.ReadWriteSelfForChat.All","AccessReview.ReadWrite.All","OnPremisesPublishingProfiles.ReadWrite.All","Directory.ReadWrite.All","TeamsActivity.Send","TeamsTab.ReadWrite.All","IdentityRiskyUser.ReadWrite.All","EduAssignments.ReadWriteBasic.All","MailboxSettings.Read","EduAdministration.Read.All","Calls.JoinGroupCallAsGuest.All","ThreatIndicators.ReadWrite.OwnedBy","TeamsAppInstallation.ReadWriteSelfForTeam.All","Sites.Read.All","PrintJob.Read.All","DeviceManagementServiceConfig.Read.All","Sites.ReadWrite.All","ServiceMessage.Read.All","Contacts.ReadWrite","Team.Create","ApprovalRequest.ReadWrite.AdminConsentRequest","Group.Create","Group.ReadWrite.All","TeamsApp.ReadWrite.All","Sites.Manage.All","SecurityEvents.ReadWrite.All","Notes.Read.All","PrintJob.ReadWrite.All","EntitlementManagement.Read.All","CallRecords.Read.All","IdentityUserFlow.Read.All","User.Invite.All","ChatMessage.Read.All","EduRoster.ReadWrite.All","Files.ReadWrite.All","Directory.Read.All","RoleManagement.Read.All","CallRecord-PstnCalls.Read.All","PrivilegedAccess.Read.AzureResources","User.Read.All","ApprovalRequest.Read.AdminConsentRequest","Domain.Read.All","EduAssignments.ReadBasic.All","EduRoster.ReadBasic.All","ChannelMember.Read.All","Schedule.Read.All","TeamsAppInstallation.ReadWriteForUser.All","DeviceManagementServiceConfig.ReadWrite.All","UserNotification.ReadWrite.CreatedByApp","GroupMember.Read.All","TeamMember.ReadWrite.All","ApprovalRequest.Read.CustomerLockbox","UserShiftPreferences.ReadWrite.All","DeviceManagementRBAC.Read.All","TrustFrameworkKeySet.ReadWrite.All","IdentityProvider.ReadWrite.All","Files.Read.All","EntitlementManagement.ReadWrite.All","Organization.ReadWrite.All","DeviceManagementConfiguration.Read.All","Team.ReadBasic.All","PrintTaskDefinition.ReadWrite.All","Mail.Read","AppRoleAssignment.ReadWrite.All","Chat.Read.All","DeviceManagementManagedDevices.ReadWrite.All","ChannelMessage.Read.All","PrivilegedAccess.ReadWrite.AzureAD","User.Export.All","EduAssignments.Read.All","SecurityActions.Read.All","TeamsAppInstallation.ReadWriteForTeam.All","ThreatAssessment.Read.All","IdentityProvider.Read.All","PrivilegedAccess.ReadWrite.AzureResources","TeamSettings.Read.All","Calendars.ReadWrite","IdentityRiskyUser.Read.All","AccessReview.Read.All","TermStore.Read.All","EduAdministration.ReadWrite.All","Mail.Send","ApprovalRequest.ReadWrite.PriviligedAccess","PrivilegedAccess.Read.AzureADGroup","Chat.ReadWrite.All","ApprovalRequest.ReadWrite.EntitlementManagement","User.ManageIdentities.All","InformationProtectionPolicy.Read.All","ChannelMessage.UpdatePolicyViolation.All","MailboxSettings.ReadWrite","Organization.Read.All","ChannelMember.ReadWrite.All","RoleManagement.ReadWrite.Directory","GroupMember.ReadWrite.All","Contacts.Read","IdentityRiskEvent.Read.All","Mail.ReadBasic","ChannelSettings.ReadWrite.All","AdministrativeUnit.ReadWrite.All","AuditLog.Read.All","Channel.Create","Policy.Read.All","TermStore.ReadWrite.All","ApprovalRequest.Read.PriviligedAccess","Member.Read.Hidden","DeviceManagementConfiguration.ReadWrite.All","Chat.ReadBasic.All","Calls.AccessMedia.All","Application.Read.All","ProgramControl.Read.All","DeviceManagementManagedDevices.PrivilegedOperations.All","ServiceHealth.Read.All","TeamsAppInstallation.ReadWriteForChat.All","Sites.FullControl.All","Policy.ReadWrite.Authorization","DeviceManagementApps.ReadWrite.All","DeviceManagementApps.Read.All","ThreatIndicators.Read.All","TeamsAppInstallation.ReadForTeam.All","ShortNotes.Read.All","ProgramControl.ReadWrite.All","Reports.Read.All","PrintJob.ReadBasic.All","Calls.Initiate.All","ExternalItem.ReadWrite.All","Notes.ReadWrite.All","ApprovalRequest.Read.EntitlementManagement","DeviceManagementRBAC.ReadWrite.All","TrustFrameworkKeySet.Read.All","Policy.ReadWrite.FeatureRollout","Policy.ReadWrite.TrustFramework","PrivilegedAccess.ReadWrite.AzureADGroup"],"sub":"76fd03ae-1701-4abe-b2b6-b04efedaae85","tenant_region_scope":"AS","tid":"e86bf821-d6ea-4510-8ffb-7c686c6457f2","uti":"HIVs2j1R_06ba66nK4QLAA","ver":"1.0","xms_tcdt":1594628256}.a2gPsNyiJxNn3gD1WgibPuD55VC1hxirBkHjMa5xIn242AJJ2bpITcuun3glSSel9rHefmVEnqV9UXkSeq4OJTMGL-XrzZSUw09EkbKxOIq9FqWIJLe_LZS54to6xM62z4V-3YrNSHS9dUsQXRRoaeTe6_n_zzdx_epFtvoNiKnxmSggMN1Ly8yBJPitDpZsqjLtIRWcLRnARFD-_A8VkBjGr2k4KWTlcFlt7ltPDRfqEio7FNpRq4-B_4M14JuDEPAybdoJKXoyg87bFUmNMFf-lPnEmxNuHcUmYU3iy8ZJnX6SU1vCZwln0dQMUb_U7sOI796af7g8INksxVAwCA' \
--data-raw '{
"body": {
"content": "Hello World"
}
}'
In response it throws Unauthorized Error
{
"error": {
"code": "Unauthorized",
"message": "Unauthorized",
"innerError": {
"date": "2020-11-14T12:54:36",
"request-id": "d2e6aaa7-2884-4e4d-bd71-b92038b",
"client-request-id": "d2e6aaa7-2884-4e4d-bd71"
}
}
}
Just to get this working for testing purpose, i have given all permissions for delegated and application(About 442 permissions) with admin consent but still response throws "Unauthorized Error"
So can someone help out over here, where am i getting it wrong.
What is right procedure to send a message to channel of a MS team using MS-Graph-api or what else needs to be enable/done which i am forgetting over here, to get this working.

Answer 1

Only delegated permission will work in this scenario & not the application permissions. Make sure you have the following permissions - ChannelMessage.Send, Group.ReadWrite.All - as one of the permissions is required to call this API.
Just to isolate the above issue, test the same Graph API call, with
the above said permissions in Microsoft Graph explorer and see if you
can able to send message to channel or not. Here's the doc.
Based on that you used grant_type as authorization code to send messages to a channel successfully.

Answer 2

Use grant_type as authorization code for sending messages to a channel as grant_type client_credentials is not supported in delegated permission as pointed out on this link as well https://developer.microsoft.com/en-us/graph/blogs/30daysmsgraph-day-12-authentication-and-authorization-scenarios/
For others to move forward follow above link to get the authorization code and use it to generate bearer access token to send messages to a channel
Delegated permissions required to generate bearer access token: "openid profile User.Read email"
To Generate access-token
curl --location --request POST 'https://login.microsoftonline.com/<Tenant_ID>/oauth2/v2.0/token' --header 'Content-Type: application/x-www-form-urlencoded' --header 'Cookie: x-ms-gateway-slice=prod; stsservicecookie=ests; fpc=AiMjowz5Jo5EvQyTMhzOqaQ9npEsAQAAAOMFRtcOAAAAqSBP-gEAAABXBkbXDgAAAA' --data-urlencode 'client_id=<client_ID>' --data-urlencode 'client_secret=<client_secret>' --data-urlencode 'redirect_uri=http://localhost' --data-urlencode 'grant_type=authorization_code' --data-urlencode 'scope=openid profile offline_access User.Read' --data-urlencode 'code=0.AAAAIfhr6OrWEEWP-3xobGRX8hpZv2PH4fVJh6PLsdEHaztTAOY.AQABAAIAAAB2UyzwtQEKR7-rWbgdcBZIMB3WJhW2dvCBgjVNf-tzDc_9Yc7YnN1JrIZtaE8b0L4RylYkzJkGWZAcxeTrMDhhjrjCJDGMOjkLPf8Jd0lLX6C7tFOU-RRg1tNDds0kI1RDdRJRYBMVFOr_riKgCwAKWgKrAd18Tr-anqLt_iTn7TLmCIN1dsL4wVFJPkhOBS0yPaoz0B07CzHWX2dUxMKhVoe7DpPibRxa6cue4zpm0JNqRWfuENIBf5qtOdghIeTa4DvrIosjhEKswdIKD1bc4LQIt6-y7-fUn7pNgbJH1b2PfOu-rtrrBjCgra9MMcnWKT_rx7Rgi_VHxERmm06SubWNI_YmmAwaSqj8ni_qUFZNULr5IT0RPIdaFmnb7xduvwfaeBdho0cHGJoBR3omYsaHygEK-xraP9vD-Dm3NdqlVYuQYKB2O5uVuyTDA--7sN7Ay5gQHkz98xfOuT4aU18YQ1Ji1vE5KffCbsFoUwzHiLoz-QcdMs7BBHR0C13z1o_qjx8SYgWZhlOwzA4-r91ErOi-AoZYqgk6yBhP_w7K-3YNFcxkNaqi4LIg8rarP0bFeioJgW3Htmsd1Ogk0y5kUSUnu1o5-paac8J9p9gpxuxM_Bj3GJ8P-SkuPueNY16kQ_qlW-JuqtrRp0mtFyeNVpHDY2vCUbJRpCw85tX247A-iGYBlsE7_BEj2wqcbeIZwXLOoKSmwxP2I5i_69m07FOz3hmYcl39sAjq8SItfFWcMPW1fWTEzqJy9dGsYulGHEDtx2iMTJsf9X_SEUrnAO8bqNLbJFDVcTFoxFrqFB7VjrjWH-4ed8erdHiEJnGVVjuQ1a_aW7pLIdo0r5zvF4PA9cvVjAlFyLi0ybhWD1vKu-EeTDqyG4uO2NW45Jow5GDGVPYIr2fKNZWdzNzFgcMsqo5hCsobL9lvd7DQIsa4W2dZ9UJjMQZ5NGKdcnL6ks8ZX44_DBcTkRBkWIXSJqEIh0WxdHjvC-_hWBifJ4xArQ5aAl5TucxEv7wwpB-tGou2mG_XvyLxNnrbOt-ltyc5aZTRZ1J_iOO7wX8AkNXM4-MsSFESyPAGhgJlClZCEtOZZLKhe99vmTvpinWyS72T5E1yWOUSCopFr2X2e0g-Fi8q1pNdAk1tw91ZtGhPBXk8BJAzjUut1T8nHiG_OE4inmGaK7rGsy-uKtCQGuALjxgpi_kAtDfGhYyzxiPe7Itu1od31M83y6H7ZOC9XVkQrI9jrt_Jn3wTwqRjFuwWwpCxK2iAc6y3pskgAA'
Below will be the response
{
"token_type": "Bearer",
"scope": "ChannelMessage.Send Group.ReadWrite.All openid profile User.Read email",
"expires_in": 3599,
"ext_expires_in": 3599,
"access_token": "eyJ0eXAiOiJKV1QiLCJub25jZSI6IloxNG9xVEI5cjFYcldGZUJQQzNjU0VwR2p3aXlpUUZPVC1hTXBsaTZrMFkiLCJhbGciOiJSUzI1NiIsIng1dCI6ImtnMkxZczJUMENUaklmajRydDZKSXluZW4zOCIsImtpZCI6ImtnMkxZczJUMENUaklmajRydDZKSXluZW4zOCJ9.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.SDn4NIiHLxvGp0odn7C_hXZ0juSsgnyE_Dc0uTwMK_jP_n7-SjisYfw1vOoX7st5-C27_HwLoSWxUt1cqL7ENcrt_7HXvZSwFsXVN4JCeEOVZUZUzUakcmttUISPPPygLhv4-EPD-sBC8TDs9ncIYDUKqbTYh1aKkRsIK5O19GvoJQ4UUzHV6o-raW8jTBdXRfH1Bz6N7CPfcPkivTn1a-zOthy1HrlFBCFCErJBum_3QhmAHkoA9UPOEKKZeJBl_k3VqsZBcNById-X591ukyi06Kk8kHfYoigiiXm7lv0-NLsHoVq9e4sBemIjYzHd3mUhN3ayPYOTAwnUCsb9kA",
"refresh_token": "0.AAAAIfhr6OrWEEWP-3xobGRX8hpZv2PH4fVJh6PLsdEHaztTAOY.AgABAAAAAAB2UyzwtQEKR7-rWbgdcBZIAQDs_wIA9P-VaK7kTxu67GVpgkENaxo5RaJz1G_GtnJ7x9V-YNDrLpkidtc-D_zgeGu8FpyC_Zh0ZwFZ_4orR_2q3mFf_J2MJ8caI6qrsyIDRPhRZE9PWZ1fYTfIlB4zbIg5l2B2_M5u7FsBdAjvkCelDNlG36Ev9vFBGSHG1XY4sJwVTmyTrgp_dyafCfc4-JqbQwUqIp44MdZon2n5XhfeOJsFDWPcx0VyPwL4yTLZ78htAv41msxO16qnOihaRESza1gpRAlcYvTbFMJyJBPQny-WOqIuGtJ8tRbbj8GkeSmV4IJ0-jkeHhCUD3JQVcyR9vepmKLGoH1ACVnm47_qYMKli4dR8MiOFReAbm1uP3YmGDDN9enRoIBCHz3w0GQYjb9RVDE9hZuzlP6jSx34GXcEOboXe6MbQpxO-Tg70BFk9jP8U7OMlht8WYFBm_ztGkBuDAvMe2dAtJjOI1VbqYQhuJ-h_iWco3jh9pexDQkaIG_L1v8ByAvCJ3dxbkMceC1Vgq7ekmRwanWL2GqPYfpmYF40U1VG30QhhjWdA4lx_QkpvqqHMU8D3heS1NsBtIdJ4XngCatSANWXLAEw0_OPA4xGmlb6PN0qHphQ24npwsqqswcxA0i6mAhSU1huxwSU2VIn0BcbZd4oX1j6DsMQIRxxoaQ8mhhF3xfNkIeACPgly6Bc7uXFTZE9f0M6UxaUgrivdcXLX8LtCFpGRJms0voZaRolVvmgegHwclAMBsBS0TN56FldE9QXXGS4k4LJprwjXTpxrE2eEeum-CQpiljvXkuotONASek-62a-YKWhhoYukxIcud3_hq45KJP3AzW6wLx7IMx2HBnPMaUmXJl4-7nR7r_NPSeJsffLa62MQ4HI84qNR0ToMQpqilSJCYaGo37VbYy9UekA0WSRoYSmiZ0CMXTBo9tW1VVkST5kZAZ9h2RZl_-W-agfkxzT7cZxaoKAc1pP1G380w2T5Zl8TGwYLqVbPWMf-Iyih9hrQ7oitv7xQqVuCNI4Q_hq1D0kjMrEetMaDP8mNKoAosJ1_b8hUlYXj5geAL9alkcarwQchn4cXwXfLvOxEWjthHAuUPavdwgEGznuTRfT94dpUdz2s9vx9_ajguS07gOz1dOM5RR65yVUXZoH7mTkYqzzj5EHjCbzi-7m7WpgY2cGt5amj-XMnmVQqjjLCto1anKeuhnY_ummurWWCO_zjJmdhMfuMvN785KLdZjABmR0QzXg9-aOoJheK4kne-rJl4xpX0IcDFwHxzQTWoFYVltPJfY2YUDQfSOVtSrbIEU4VHP7ewCB6NTsP2ZU2sJRHSXpcppLDmwKMeEbFSyiB-VbXMiE_a_VU8jF1cl6BkBGor4PunGKCWfeuIXywqqWZ9sYQnRnXRXA-_9d1EQv7yC-LKgVbViSJJviLrrSgpf8ZHi4-6mGUdE2M4FyilLNMq8pkI825RRYPr8dWtdLavuECwYxV9qrzcOfkUuNIQ-SFXkmd6JNQ9jDw5VLshPwTrnHfXubqbIUfAoEwEiBWs0rFZz_Q7aV_WsBllUg4rSeiujFgmOdWWewXo_L3myd9Q9eoUMtWiTa3I-ElmyfhOdcn8Oiznj3094lzLojCLEsvlp7mC8FtJe84qYDKlA",
"id_token": "eyJ0eXAiOiJKV1QiLCJhbGciOiJSUzI1NiIsImtpZCI6ImtnMkxZczJUMENUaklmajRydDZKSXluZW4zOCJ9.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.f9x2VPo2-1lNb7PNlcPqRXe4A78m546Y557nAjSoBYRDrwwQj6r3uYG6zzkOXFOhXnbCDchTaFv0kn8cDKNFaQWKaw_XIGYveihof9h9bX8lj7V72L1hWlya2zriMFhATeePmL4VUMu9khg3yD1Z-Sj0RM4IP0rPzbYN3IskuAN5lNXeTdV0xrra9FdvMolrRdMT9Bt14-QG8za4OoWDTb-s5Bq8kZUrhiVkKP4GowRYWBLFXxKThrPE4zQK6EJREMbmBTHy3nrxF_smNqQjCwE95T0qBAnPC6hQQEXO_U_J3EcAD9hPB-bzFiR3nIs6rK_MEinwcSs6QEgl4CDOxw"
}
To Send message to a channel
Delegated permissions required to send message: "ChannelMessage.Send Group.ReadWrite.All"
curl --location --request POST 'https://graph.microsoft.com/beta/teams/team_ID/channels/channel_ID/messages' --header 'Authorization: Bearer eyJ0eXAiOiJKV1QiLCJub25jZSI6IloxNG9xVEI5cjFYcldGZUJQQzNjU0VwR2p3aXlpUUZPVC1hTXBsaTZrMFkiLCJhbGciOiJSUzI1NiIsIng1dCI6ImtnMkxZczJUMENUaklmajRydDZKSXluZW4zOCIsImtpZCI6ImtnMkxZczJUMENUaklmajRydDZKSXluZW4zOCJ9.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.SDn4NIiHLxvGp0odn7C_hXZ0juSsgnyE_Dc0uTwMK_jP_n7-SjisYfw1vOoX7st5-C27_HwLoSWxUt1cqL7ENcrt_7HXvZSwFsXVN4JCeEOVZUZUzUakcmttUISPPPygLhv4-EPD-sBC8TDs9ncIYDUKqbTYh1aKkRsIK5O19GvoJQ4UUzHV6o-raW8jTBdXRfH1Bz6N7CPfcPkivTn1a-zOthy1HrlFBCFCErJBum_3QhmAHkoA9UPOEKKZeJBl_k3VqsZBcNById-X591ukyi06Kk8kHfYoigiiXm7lv0-NLsHoVq9e4sBemIjYzHd3mUhN3ayPYOTAwnUCsb9kA' --header 'Content-Type: application/json' --data-raw '
{
"body": {
"content": "Hello world"
}
}'
Below will be the response
{
"#odata.context": "https://graph.microsoft.com/beta/$metadata#teams('<team-ID>')/channels('<channel_ID>')/messages/$entity",
"id": "1605635994172",
"replyToId": null,
"etag": "1605635994172",
"messageType": "message",
"createdDateTime": "2020-11-17T17:59:54.172Z",
"lastModifiedDateTime": "2020-11-17T17:59:54.172Z",
"lastEditedDateTime": null,
"deletedDateTime": null,
"subject": null,
"summary": null,
"chatId": null,
"importance": "normal",
"locale": "en-us",
"webUrl": "https://teams.microsoft.com/l/message/channel-ID/1605635994172?groupId=<team-ID>&tenantId=<tenant-ID>&createdTime=1605635994172&parentMessageId=1605635994172",
"policyViolation": null,
"from": {
"application": null,
"device": null,
"conversation": null,
"user": {
"id": "4faab178-9f24-4cd7-a144-d261c91d1ba2",
"displayName": "admin",
"userIdentityType": "aadUser"
}
},
"body": {
"contentType": "text",
"content": "Hello World"
},
"channelIdentity": {
"teamId": "team-ID",
"channelId": "channel-ID"
},
"attachments": [],
"mentions": [],
"reactions": []
}