topic MS Teams with Cisco Codec in Webex Meetings and Webex App

MS Teams with Cisco Codec

ernestotrevr — Wed, 17 Sep 2025 13:31:40 GMT

My employer (public administration) uses Webex as video conference software and has Cisco codecs for small conference rooms. For certain tasks we need to have video conference with other organizations that use MS Teams or Zoom. Joining MS Teams or Zoom calls hosted by other organizations via the Cisco tenant doesn’t work. The codec shows an error message that a CVI-tenant is active but is not available due to a missing license. Do we lack the right license or the organizations hosting the call?

Re: MS Teams with Cisco Codec

Jonathan Schulenberg — Wed, 17 Sep 2025 15:33:17 GMT

Does the Teams meeting invite from the other organization have a “Join on a video conferencing device” section in it?

If it does the codec is attempting to use the host’s CVI subscription through Cisco or Pexip to join the meeting. If that’s broken it will fail to join (e.g. the host org discontinued their subscription but failed to properly decommission it in their tenant). You could work around this by using the Microsoft Teams button in RoomOS 11 instead of OBTP and entering the meeting ID & passcode instead of the VTC tenant key and access key.

If not then the codec thinks your Webex Control Hub tenant has CVI configured and it must not be working. Cisco’s VIMT implementation of CVI now supports cross-tenant joins, so the codec will attempt to leverage that if the received invite doesn’t have CVI join details. If you’re paying for VIMT licenses on your Collaboration Flex subscription you may want to review the configuration - especially the authorization into your M365 tenant.

The codec will default to a WebRTC join in the total absence of CVI capabilities, if it’s enabled.

Re: MS Teams with Cisco Codec

streitan — Tue, 24 Feb 2026 20:03:25 GMT

There are multiple Teams clouds, and calling between them is not trivial. Maybe that's the problem. Here's a blog explaining the problem and solution: https://www.synergysky.com/blog/the-microsoft-teams-wall-is-real-bridging-the-gap-between-federal-and-civilian-collaboration