Error Calling Beta Subscription endpoint for OnlineMeetings notifications

Question

Hi All,

We are trying to subscribe to notifications fro an online meeting that we are successfully creating with the onlinemeetings endpoint.

I have the below function in node.js to make a call to beta/subscriptions. I am not using ngrok, but I have my notificationUrl in my azure idp yml file reply_urls which is working for authcodes from MS.

The joinUrl a string returned directly from the createMeeting call.

I am getting the following error:

'{"error":{"code":"InvalidRequest","message":"Unable to connect to the remote server","innerError":{"date":"2023-06-02T18:17:53","request-id":"06a8021d-6508-4d14-bb20-58cfe67fe781","client-request-id":"06a8021d-6508-4d14-bb20-58cfe67fe781"}}}

Any help would be greatly appreciated.

Thanks!

function subscribeToCallRecords(joinUrl: string) {  

cca.acquireTokenByClientCredential({ scopes: ['https://graph.microsoft.com/.default'] }).then(async codeResponse => {
    const { accessToken } = codeResponse;
    await superagent.post(`https://graph.microsoft.com/beta/subscriptions`)
    .set('Accept', 'application/json')
    .auth(accessToken, { type: 'bearer' })
    .send({
           changeType: 'updated',
           notificationUrl: 'https://localhost:3000/api/ms-graph/subscription-response',
           includeResourceData: true,
           resource: `/communications/onlineMeetings/?$filter=JoinWebUrl eq '${joinUrl}'`,
           expirationDateTime: new Date(Date.now() + 3600000).toISOString(),
           encryptionCertificateId: process.env.ENCRYPTION_CERT_ID,
           encryptionCertificate: process.env.BASE64_ENCRYPTION_CERT,
           clientState: 'ClientState'
         })
   .then(response => { 
     console.log('RESPONSE', response);
     return response;
     })
   .catch(error => {
      console.log('ERROR', error);
    });
})
}