2 SSTP clients: No ringing while starting a call within Microsoft Teams

Question

Hello,

so we have 2 clients:

• client A connects to a VPN server vpn.mydomain.com (Windows server 2019 with SSTP and IPv4 only)
• client B connects to the same server, i.e. vpn.mydomain.com with SSTP

A:

• client A wants to call client B within Microsoft Teams. A sceen shows up and it is ringing.
• client B doesn´t see anything. There´s no ringing.

B:

• client A stops calling client B
• Now client B sees a missing call from client A

It doesn´t matter which client, as long of one of the clients is connected to the VPN server vpn.mydomain.com and the other client is not connected to the same VPN server, the call works without any problems. If both clients are connected concurrently it fails.

Has anyone ever had such a problem?

Kind Regards

Answer 1

Hi @Chris4711CD ,

Do you mean the receiver cannot see any windows notification in Microsoft Teams?

Do you have the same issue in Teams web client?

According to your description, it seems related to your network environment. It recommends you provide an alternate path for Teams traffic that bypasses the virtual private network (VPN). For more details about it, you can refer to:

https://learn.microsoft.com/en-us/microsoftteams/prepare-network#network-optimization

In addition, please try to sign out Teams client and clear cache file to see if it works for you.

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