curl --request POST \
  --url https://your-instance.example.com/api/webhook/email/outlook \
  --header 'Content-Type: application/json' \
  --data '
{
  "value": [
    {
      "subscriptionId": "7f4b2c1d-9e0a-4b3c-8d5e-6f7a8b9c0d1e",
      "subscriptionExpirationDateTime": "2026-05-20T15:04:01.135Z",
      "changeType": "created",
      "resource": "Users/ops@acme.example/Messages/AAMkAGI2T..==",
      "resourceData": {
        "@odata.type": "#Microsoft.Graph.Message",
        "@odata.id": "Users/ops@acme.example/Messages/AAMkAGI2T..==",
        "id": "AAMkAGI2T..=="
      },
      "clientState": "tether-outlook-secret",
      "tenantId": "5f7b1c2e-8a1d-4e00-12c3-b4a55f7b1c2e"
    }
  ]
}
'

import requests

url = "https://your-instance.example.com/api/webhook/email/outlook"

payload = { "value": [
        {
            "subscriptionId": "7f4b2c1d-9e0a-4b3c-8d5e-6f7a8b9c0d1e",
            "subscriptionExpirationDateTime": "2026-05-20T15:04:01.135Z",
            "changeType": "created",
            "resource": "Users/ops@acme.example/Messages/AAMkAGI2T..==",
            "resourceData": {
                "@odata.type": "#Microsoft.Graph.Message",
                "@odata.id": "Users/ops@acme.example/Messages/AAMkAGI2T..==",
                "id": "AAMkAGI2T..=="
            },
            "clientState": "tether-outlook-secret",
            "tenantId": "5f7b1c2e-8a1d-4e00-12c3-b4a55f7b1c2e"
        }
    ] }
headers = {"Content-Type": "application/json"}

response = requests.post(url, json=payload, headers=headers)

print(response.text)

const options = {
  method: 'POST',
  headers: {'Content-Type': 'application/json'},
  body: JSON.stringify({
    value: [
      {
        subscriptionId: '7f4b2c1d-9e0a-4b3c-8d5e-6f7a8b9c0d1e',
        subscriptionExpirationDateTime: '2026-05-20T15:04:01.135Z',
        changeType: 'created',
        resource: 'Users/ops@acme.example/Messages/AAMkAGI2T..==',
        resourceData: {
          '@odata.type': '#Microsoft.Graph.Message',
          '@odata.id': 'Users/ops@acme.example/Messages/AAMkAGI2T..==',
          id: 'AAMkAGI2T..=='
        },
        clientState: 'tether-outlook-secret',
        tenantId: '5f7b1c2e-8a1d-4e00-12c3-b4a55f7b1c2e'
      }
    ]
  })
};

fetch('https://your-instance.example.com/api/webhook/email/outlook', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

<?php

$curl = curl_init();

curl_setopt_array($curl, [
  CURLOPT_URL => "https://your-instance.example.com/api/webhook/email/outlook",
  CURLOPT_RETURNTRANSFER => true,
  CURLOPT_ENCODING => "",
  CURLOPT_MAXREDIRS => 10,
  CURLOPT_TIMEOUT => 30,
  CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
  CURLOPT_CUSTOMREQUEST => "POST",
  CURLOPT_POSTFIELDS => json_encode([
    'value' => [
        [
                'subscriptionId' => '7f4b2c1d-9e0a-4b3c-8d5e-6f7a8b9c0d1e',
                'subscriptionExpirationDateTime' => '2026-05-20T15:04:01.135Z',
                'changeType' => 'created',
                'resource' => 'Users/ops@acme.example/Messages/AAMkAGI2T..==',
                'resourceData' => [
                                '@odata.type' => '#Microsoft.Graph.Message',
                                '@odata.id' => 'Users/ops@acme.example/Messages/AAMkAGI2T..==',
                                'id' => 'AAMkAGI2T..=='
                ],
                'clientState' => 'tether-outlook-secret',
                'tenantId' => '5f7b1c2e-8a1d-4e00-12c3-b4a55f7b1c2e'
        ]
    ]
  ]),
  CURLOPT_HTTPHEADER => [
    "Content-Type: application/json"
  ],
]);

$response = curl_exec($curl);
$err = curl_error($curl);

curl_close($curl);

if ($err) {
  echo "cURL Error #:" . $err;
} else {
  echo $response;
}

package main

import (
	"fmt"
	"strings"
	"net/http"
	"io"
)

func main() {

	url := "https://your-instance.example.com/api/webhook/email/outlook"

	payload := strings.NewReader("{\n  \"value\": [\n    {\n      \"subscriptionId\": \"7f4b2c1d-9e0a-4b3c-8d5e-6f7a8b9c0d1e\",\n      \"subscriptionExpirationDateTime\": \"2026-05-20T15:04:01.135Z\",\n      \"changeType\": \"created\",\n      \"resource\": \"Users/ops@acme.example/Messages/AAMkAGI2T..==\",\n      \"resourceData\": {\n        \"@odata.type\": \"#Microsoft.Graph.Message\",\n        \"@odata.id\": \"Users/ops@acme.example/Messages/AAMkAGI2T..==\",\n        \"id\": \"AAMkAGI2T..==\"\n      },\n      \"clientState\": \"tether-outlook-secret\",\n      \"tenantId\": \"5f7b1c2e-8a1d-4e00-12c3-b4a55f7b1c2e\"\n    }\n  ]\n}")

	req, _ := http.NewRequest("POST", url, payload)

	req.Header.Add("Content-Type", "application/json")

	res, _ := http.DefaultClient.Do(req)

	defer res.Body.Close()
	body, _ := io.ReadAll(res.Body)

	fmt.Println(string(body))

}

HttpResponse<String> response = Unirest.post("https://your-instance.example.com/api/webhook/email/outlook")
  .header("Content-Type", "application/json")
  .body("{\n  \"value\": [\n    {\n      \"subscriptionId\": \"7f4b2c1d-9e0a-4b3c-8d5e-6f7a8b9c0d1e\",\n      \"subscriptionExpirationDateTime\": \"2026-05-20T15:04:01.135Z\",\n      \"changeType\": \"created\",\n      \"resource\": \"Users/ops@acme.example/Messages/AAMkAGI2T..==\",\n      \"resourceData\": {\n        \"@odata.type\": \"#Microsoft.Graph.Message\",\n        \"@odata.id\": \"Users/ops@acme.example/Messages/AAMkAGI2T..==\",\n        \"id\": \"AAMkAGI2T..==\"\n      },\n      \"clientState\": \"tether-outlook-secret\",\n      \"tenantId\": \"5f7b1c2e-8a1d-4e00-12c3-b4a55f7b1c2e\"\n    }\n  ]\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://your-instance.example.com/api/webhook/email/outlook")

http = Net::HTTP.new(url.host, url.port)
http.use_ssl = true

request = Net::HTTP::Post.new(url)
request["Content-Type"] = 'application/json'
request.body = "{\n  \"value\": [\n    {\n      \"subscriptionId\": \"7f4b2c1d-9e0a-4b3c-8d5e-6f7a8b9c0d1e\",\n      \"subscriptionExpirationDateTime\": \"2026-05-20T15:04:01.135Z\",\n      \"changeType\": \"created\",\n      \"resource\": \"Users/ops@acme.example/Messages/AAMkAGI2T..==\",\n      \"resourceData\": {\n        \"@odata.type\": \"#Microsoft.Graph.Message\",\n        \"@odata.id\": \"Users/ops@acme.example/Messages/AAMkAGI2T..==\",\n        \"id\": \"AAMkAGI2T..==\"\n      },\n      \"clientState\": \"tether-outlook-secret\",\n      \"tenantId\": \"5f7b1c2e-8a1d-4e00-12c3-b4a55f7b1c2e\"\n    }\n  ]\n}"

response = http.request(request)
puts response.read_body

"A1B2C3D4-E5F6-7890-ABCD-EF1234567890"

"Accepted"

{
  "error": "Webhook processing failed"
}