Teams calling not working with any FortiClient version 6.0 or higher
We have teams and it appears that it works fine in version 5.6. However any version higher than that i.e. 6.0, 6.2, etc, calls do not work. Our setup is IPsec using a full tunnel.
When connected to VPN, the teams app itself connects fine. However when you dial a user on the LAN for a call, the recipient on the other end gets the "Sorry, we couldn't connect you" message. On the callers side it continues to ring. We have tried opening up every port to and from the VPN client to the LAN network to test but it still produces the problem.
The worse part is Fortigate refuse to look at it since we do not have EMS licensing which we don't have any intention of buying. I am surprised there aren't others out there with the same issue.
Has anyone else come across this??