For Teams SlimCore optimization on Citrix, the Virtual Channel Allow List policy in Citrix Studio must allow the custom virtual channels MSTEAMS, MSTEAM1 and MSTEAM2; if they are blocked, Teams logs error 2003 (deployErrc 16026).
Checked 2026-10-02
- Vendor
- Microsoft
- Product
- Microsoft Teams
- Subsystem
- VDI 2.0 Citrix virtual channels
- Deployment
- vdi
- Region
- not restricted
- Release range
- current as of 2026-10-02
- Checked
- 2026-10-02
Sources
- Troubleshooting the VDI 2.0 solution for Teams — Microsoft · tier 2 current vendor documentation · Introductory troubleshooting step 1; Connection error table row 2003 / 16026
Cite this note
APA
WarmTransfer. (2026, October 2). Troubleshooting softphones in Citrix and VMware virtual desktops: source note vdi-softphone-troubleshooting-teams-citrix-vc-allowlist. WarmTransfer. https://warmtransfer.net/knowledge/claims/vdi-softphone-troubleshooting-teams-citrix-vc-allowlist
BibTeX
@misc{warmtransfer-claim-vdi-softphone-troubleshooting-teams-citrix-vc-allowlist,
title = {Troubleshooting softphones in Citrix and VMware virtual desktops: source note vdi-softphone-troubleshooting-teams-citrix-vc-allowlist},
author = {{WarmTransfer}},
year = {2026},
url = {https://warmtransfer.net/knowledge/claims/vdi-softphone-troubleshooting-teams-citrix-vc-allowlist},
note = {Source note vdi-softphone-troubleshooting-teams-citrix-vc-allowlist, checked 2026-10-02}
}