Hi @SlavaS2 ,
I'm afraid that the out of box connector cannot meet your needs.
I think you need to call the graph api in flow.


https://graph.microsoft.com/v1.0/chats/<chat id>/messages
{
"body": {
"contentType": "html",
"content": "<p></p>\n<attachment id=\"<message id>\"></attachment>\n<messaage body>\n<p></p>"
},
"attachments": [
{
"id": "<message id>",
"contentType": "messageReference",
"contentUrl": null,
"content": "{\"messageId\":\"<message id>\",\"messagePreview\":\"<message body>\",\"messageSender\":{\"application\":null,\"device\":null,\"user\":{\"userIdentityType\":\"aadUser\",\"tenantId\":null,\"id\":\"<user id>\",\"displayName\":\"<user name>\"}}}",
"name": null,
"thumbnailUrl": null,
"teamsAppId": null
}
],
"mentions": [],
"reactions": []
}
Best Regards,
Wearsky