---- verify the shared mailbox
GET https://graph.microsoft.com/v1.0/users/support@modymix.com

--- request error message ----
{
    "error": {
        "code": "Authorization_RequestDenied",
        "message": "Insufficient privileges to complete the operation.",
        "innerError": {
            "date": "2026-01-28T14:39:09",
            "request-id": "6b3ba588-9833-48d7-a80c-23acf8fb6259",
            "client-request-id": "6b3ba588-9833-48d7-a80c-23acf8fb6259"
        }
    }
}

--- Request details ----
GET https://graph.microsoft.com/v1.0/users/support@modymix.com: {
  "Network": {
    "addresses": {
      "local": {
        "address": "2601:410:4300:c960:1d5b:f153:9c40:3c48",
        "family": "IPv6",
        "port": 60155
      },
      "remote": {
        "address": "2603:1036:3000:60::85",
        "family": "IPv6",
        "port": 443
      }
    },
    "tls": {
      "reused": false,
      "authorized": true,
      "authorizationError": null,
      "cipher": {
        "name": "TLS_AES_256_GCM_SHA384",
        "standardName": "TLS_AES_256_GCM_SHA384",
        "version": "TLSv1/SSLv3"
      },
      "protocol": "TLSv1.3",
      "ephemeralKeyInfo": {},
      "peerCertificate": {
        "subject": {
          "country": "US",
          "stateOrProvince": "Washington",
          "locality": "Redmond",
          "organization": "Microsoft Corporation",
          "organizationalUnit": null,
          "commonName": "graph.microsoft.com",
          "alternativeNames": "DNS:graph.microsoft.com, DNS:microsoftgraphvalidation.ags.msidentity.com"
        },
        "issuer": {
          "country": "US",
          "stateOrProvince": null,
          "locality": null,
          "organization": "DigiCert Inc",
          "organizationalUnit": null,
          "commonName": "DigiCert SHA2 Secure Server CA"
        },
        "validFrom": "Jan 23 00:00:00 2026 GMT",
        "validTo": "Jul 22 23:59:59 2026 GMT",
        "fingerprint": "81:CF:88:A0:88:20:4A:A0:B0:4D:B4:38:06:17:AD:C2:8F:BB:2A:3A",
        "serialNumber": "04ddaac5f533f1c65905f7f6d3677f4c"
      }
    }
  },
  "Request Headers": {
    "authorization": "Bearer eyJ0eXAiOiJKV1QiLCJub25jZS ......",
    "user-agent": "PostmanRuntime/7.51.0",
    "accept": "*/*",
    "postman-token": "8f8cfbc5-77a1-4d4d-949e-a808821ea54f",
    "host": "graph.microsoft.com",
    "accept-encoding": "gzip, deflate, br",
    "connection": "keep-alive"
  },
  "Response Headers": {
    "cache-control": "no-cache",
    "transfer-encoding": "chunked",
    "content-type": "application/json",
    "content-encoding": "gzip",
    "vary": "Accept-Encoding",
    "strict-transport-security": "max-age=31536000",
    "request-id": "6b3ba588-9833-48d7-a80c-23acf8fb6259",
    "client-request-id": "6b3ba588-9833-48d7-a80c-23acf8fb6259",
    "x-ms-ags-diagnostic": "{\"ServerInfo\":{\"DataCenter\":\"North Central US\",\"Slice\":\"E\",\"Ring\":\"4\",\"ScaleUnit\":\"002\",\"RoleInstance\":\"CH01EPF000892B4\"}}",
    "x-ms-resource-unit": "1",
    "date": "Wed, 28 Jan 2026 14:39:08 GMT"
  },
  "Response Body": "{\"error\":{\"code\":\"Authorization_RequestDenied\",\"message\":\"Insufficient privileges to complete the operation.\",\"innerError\":{\"date\":\"2026-01-28T14:39:09\",\"request-id\":\"6b3ba588-9833-48d7-a80c-23acf8fb6259\",\"client-request-id\":\"6b3ba588-9833-48d7-a80c-23acf8fb6259\"}}}"
}