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VVX 411 functioning with Teams but cannot add 3rd caller or Meet Now.

Occasional Advisor

VVX 411 functioning with Teams but cannot add 3rd caller or Meet Now.

We have Poly VVX 411s and migrated from SfB to Teams in Jan. this year.  All users are now Teams only with O365.  Our IT staff have all migrated to headsets working with the Teams desktop client so we wouldn't have noticed this issue.  We'd like to move all users that direction but will always have some users that can't live without a desk phone.  As new phones are needed we've moved to CCX 400/500/600s but we can't replace 1600 VVX 411s at once. 


About 2 weeks ago, some 411 users reported they could no longer add a 3rd user to an ongoing call.  I've tested on a 411 and adding another caller shows "Connecting to Conference" followed by "The conference service is unresponsive. Try again later."  Tapping Meet Now on the 411 has the same result.  Is this expected behavior for a 3PIP phone or do we have something misconfigured with our Skype to Teams interop? I have to believe we would have had complaints back in January if none of the 411 users could add additional callers.


Looking at Interoperability of Teams and SfB, is this what is meant here?    

  • Escalating an ongoing peer-to-peer voice or video call to a multiple-party call involving both Teams and Skype for Business users isn't supported.

Our 411s are on FW and paired with the user's device using BToE 4.3.  I've tested with the same results with the only available upgrade, v.

I cleared the logs, tapped Meet Now, and then captured the log (attached).

Thanks in advance. 

Message 1 of 3
Polycom Employee & Community Manager

Re: VVX 411 functioning with Teams but cannot add 3rd caller or Meet Now.

Hello @PASSR ,


Welcome back to the Poly Community.

Based on the information nothing changed for multiple months running the same software so have you checked with our Partner Microsoft as of yet?


The log does not show any real info.


Jan 17, 2017 Question: How can I troubleshoot simple Skype for Business, Office365 or Teams issues?

Resolution: Have a look => here <=


Please ensure to provide some feedback if this reply has helped you so other users can profit from your experience.

Best Regards

Steffen Baier

The title Polycom Employee & Community Manager is a community setting and does not reflect my role. I am just a simple volunteer in the community like everybody else. My official "day" Job is 3rd Level support at Poly but I am unable to provide official support via the community.


Notice: This community forum is not an official Poly support resource, thus responses from Poly employees, partners, and customers alike are best-effort in attempts to share learned knowledge. If you need immediate and/or official assistance please open a service ticket through your proper support channels.
Please also ensure you always check the VoIP , Video Endpoint , Skype for Business , PSTN or RPM FAQ's
Message 2 of 3
Occasional Advisor

Re: VVX 411 functioning with Teams but cannot add 3rd caller or Meet Now.

Thanks for your reply.  Yes, we think this just started happening 3 weeks ago based on the first user complaints. We complete our Teams migration in January.  We have opened a support request with MS and are waiting on an answer. 


My basic question though is:  Should the ability to add an additional caller to an ongoing call between Teams-only users work on a VVX 411 on this firmware?  Or is adding 3rd party (in essence a conference) one of the known limitations when using the 411 with Teams?


Message 3 of 3