QUICK POST: MICROSOFT TEAMS P2P CALLS DISCONNECTING AFTER SOME SECONDS IN CITRIX HDX Session
Since a few days several clients contacted us and facing issues with Microsoft Teams which are optimized via Citrix Teams Optimization in Virtual Apps and Desktop. In a first look it seems only Peer2Peer (P2P) in some special scenarios are affected.
Our scenarios look like the following:
- One user is running Teams (1.4.00.32771 (x64)) as HDX optimized in a Citrix virtual desktop. The second peer is running teams (partially 1.5.00.2164) on his/her laptop and is NOT connected to any HDX session.
- Call establishing is working fine. Now the call is active for some seconds (5-10 sec) and suddenly the Citrix peer gets the message „Hold on, looks like something went wrong – we are trying to get you back on the Call„. After some more seconds the call is re-established for another 5-10 seconds and then the call is disconnected again and so on, and so on
- If the same Citrix user is calling an person who is also running teams in a Citrix session, the problem does not occur at all and the call is stable.
Users on virtual Desktops just facing the following Messages:
The caller on the fat client does not get any message, for those is looks like the peer isn’t talking anymore.
We opened a support case at Citrix for this and waiting for a response!
It seems to be a problem in a specific Teams version 1.5.00.2164. We are now testing version 1.5.00.4689
https://statics.teams.cdn.office.net/production-windows-x64/1.5.00.4689/Teams_windows_x64.exe
As per today, also Teams Version 1.5.00.4689 is affected and we still facing the issue. Citrix has updated the Live article in the meantime as well:
https://support.citrix.com/article/CTX253754
We are still in contact with Citrix PM, some CTPs and Citrix Support.
It’s confirmed that this is NOT a Citrix Bug and it seems Microsoft is able to implement a workaround for affected Teams tenants now. For this you have to open a MSFT case and reference to IcM# (279646315 and 291199411)

Marco Klose works as a Technical Consultant, Architect and CTO focused on Application & Desktop virtualization as well as application delivery with the Citrix product portfolio. He is specialized in Citrix virtualization, Citrix networking and Microsoft products. He has +10 years experience and holds the latest Citrix certifications and is member of the Citrix Partner Expert Council EMEA (PTEC). Since 2021 he is also a Citrix Technology Advocate (CTA).
Hi Marco,
Thanks for your blog and sharing your experiences with us. I have exactly the same error that you describe in the article. I opened a Microsoft case and referred to your two case numbers. According to the MS technician, both case numbers are invalid or unknown. It should be a composite of eight numbers. Do you happen to have another reference number I can provide? Currently you are not able to help me. Thank you in advance.