Forum Discussion
Skype for Business hybrid - Issues between on-premise and Teams only users
ms-diagnostics: 1010;reason="Certificate trust with another server could not be established";expected-fqdn="sfbedge.mydomain.com";certName="a-lgw-uswe-02.lgw.skype.com";cause="Possible server configuration issue";info="The peer certificate does not contain a matching FQDN";source="sipfed.online.lync.com";source-server="RD38563D7FA25E"
This indicates an issue with your certificates and the 30 seconds dropped calls usually indicates an issue with A/V certificate. So check your A/V certificate, remember a new certificate should be assigned using -roll as the already issued tokens are valid for up to 8 hours.
Also check if your firewall does any deep inspection on the A/V connections, this could also be an issue with the same symptoms.
/Kenneth ML
KennethML In the meantime, I tried to continue the troubleshooting, and I found out the following:
It seems that the Skype for Business client disconnects the call because we don't get any answer for our OK mesage.
Let me show you these screenshots:
Do you have any ideas about why don't we get ACK for the 200 OK? I checked the network with no luck and I don't have any more ideas.
- Interesting. I haven't seen this behaviour previously and I don't see it at a customer site (yet).
It could still indicate a problem with setting up the media path as the ACK should be sent when media path is established (late media).Ye maybe the media path changed without documentation?!
I have already tried with "ANY-Port/Protocol" for incoming and outgoing for the EDGE-Part - same issue.Also i dont think its media (only) because we cannot see the peresence of the Teams users from onprem. But its working if i query an onprem user from Teams.
- Same issue here, presence is one-way, SfB on-premise users see Teams only users as offline users.
The strange thing with the call issue is that the audio connection will be built up without any issue, I can hear the remote party, he/she can hear me but the call will be dropped after 30 sec.
i can confirm the missing ACK:
https://data.dieseltechnic.com/public/file/M2sRV8-YY06s6YGtMDoIsw/2022-11-01%2023_08_38-Window.png
whats your CU on SFB19? Could
KB4470124
Version:2046.409
Date Published:10/4/2022
Be the cause of the issue?
EduNic1800 Let me paste the output of the relevant cmdlets:
Before I ran into this issue we used an around 1.5 years old version of SfB 2019 but after that I installed the lastest updates on the Standard Edition and Edge.
- Seems you dont have the October Update(7.0.2046.409) installed, so i dont think it is caused by this CU.
Its the same for us. Federation was fine for like 12Month and suddenly its showing this behavior - except for us it is in production which breaks communication between 100Teams and 550 Onprem Users.
It would be interesting to know if Alias17273 have found a solution.
