For Citrix-optimized Teams, if UDP is blocked between the endpoint and Microsoft 365 TURN servers, the endpoint media engine falls back to TCP/TLS 443, and ICE failures can cause one-way audio or call setup failures.
Checked 2026-10-02
- Vendor
- Citrix
- Product
- Citrix Virtual Apps
- Subsystem
- HDX optimization for Microsoft Teams
- Deployment
- vdi
- Region
- not restricted
- Release range
- WebRTC-based optimization
- Checked
- 2026-10-02
Sources
- Optimization for Microsoft Teams — Citrix · tier 2 current vendor documentation · Network requirements / troubleshooting section (heading as reported by summariser)
Cite this note
APA
WarmTransfer. (2026, October 2). Troubleshooting softphones in Citrix and VMware virtual desktops: source note vdi-softphone-troubleshooting-citrix-udp-fallback-tcp. WarmTransfer. https://warmtransfer.net/knowledge/claims/vdi-softphone-troubleshooting-citrix-udp-fallback-tcp
BibTeX
@misc{warmtransfer-claim-vdi-softphone-troubleshooting-citrix-udp-fallback-tcp,
title = {Troubleshooting softphones in Citrix and VMware virtual desktops: source note vdi-softphone-troubleshooting-citrix-udp-fallback-tcp},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/vdi-softphone-troubleshooting-citrix-udp-fallback-tcp},
note = {Source note vdi-softphone-troubleshooting-citrix-udp-fallback-tcp, checked 2026-10-02}
}