AudioVideoPlaybackBot sample not joining the call.

Describe the issue
I'm having problem with the AudioVideoPlaybackBot bot, it doesn't join the call at all.

Expected behavior
The bot joins the call after calling the joinCall REST method

Logs
No available

Additional context

I'm having trouble finding out the cause, so any help or tip would be greatly appreciated (I think is a configuration issue somewhere). So far:

• I've the sample published as Cloud Service, the configuration is:
• ServiceDnsName = xyz-bot-test.cloudapp.net
• ServiceCNAME= bottest.mycompany.com
• I have and Azure CDN as:
  • Endpoint hostname: https://xyz-bot-test.azureedge.net
  • Origin hostname: https://xyz-bot-test.cloudapp.net
  • Custom Domain: bottest.mycompany.com

The SSL certificate thumbprint seems to be ok (the cloud service is running without issues)

After creating the meeting, I call the API as:
https://bottest.mycompany.com/joincall
{
"JoinURL": "https://teams.microsoft.com/l/meetup-join.... "
}

And the API returns:
{
"legId": "05203000-7e1f-4e65-a697-1e1216b56b7b",
"scenarioId": "37efed30-5084-47b5-842b-2efd3f770966",
"call": "https://bottest.mycompany.com:10101/calls/05203000-7e1f-4e65-a697-1e1216b56b7b",
"logs": "https://bottest.mycompany.com:10101/logs/05203000-7e1f-4e65-a697-1e1216b56b7b",
"changeScreenSharingRole": "https://bottest.mycompany.com:10101/calls/05203000-7e1f-4e65-a697-1e1216b56b7b/changeRole"
}

But the bot never joins the meeting

If I made this call: https://bottest.mycompany.com/calls/, the legId returned in the joinCall is not in the list (I guess it because it did finished joining the call),

Calling https://bottest.mycompany.com/logs/05203000-7e1f-4e65-a697-1e1216b56b7b returns an empty result.

I'm debugging the demo remotely (attaching the debugger to the cloud service) and the only thing I see in the output is "Exception thrown: 'Microsoft.Graph.Communications.Core.Exceptions.ServiceException' in mscorlib.dll" at some point, but I don't have extra details about error.

Any ideas? thanks in advance

Start by reproducing the /joincall request and inspect the returned /calls/{legId} and /logs/{legId} endpoints. Review the Azure Cloud Service, CDN, CNAME, and SSL configuration alongside the Microsoft.Graph.Communications.Core ServiceException output. Done means identifying the cause of the failed join and documenting a verified configuration or diagnostic fix.