Based on feedback Microsoft received from customers, we are making user interface improvements to how calls can be transferred.
Current Skype for Business Consultative Transfer behavior
When ...
Updated Feb 03, 2017
Version 8.0
Blog Post
Unfortunately, once again I had to change the name for the user of the mediation server how i described above and had set up again two other accounts for the two CCE in the high availability-cluster, it comes back to problems like Thomas Oeser described too.
The call transfer from a Polycom VVX works perfect - without interruption.
When transferring from a Skype client (USer B), the call to User C is interrupted and rebuilt. In this case, although the number of User A is displayed, but that is not really relevant. For the participants it is more pleasant to stay connected. And i'm sure it had worked fine in both cases.
Ok, even with the workaround to transfer via two call-windows, it works, but then you can save the button "Consult" also. :-(
I have also opened a ticket to MS, because I suspect with the change of Mediation server users somewhere still the old user in it and that's what it comes to these effects. Because there is no command like remove-cshybridmediationserver. I hope that can still be resolved.