Microsoft Whiteboard App is in preview. Rollout to public users will be coming soon. You can find more details here:
We acknowledge the demand for this capability and are exploring the best possible solutions to enable this.
We acknowledge the customer demand for Private Channels and have been hard at work on it. Private Channels is currently in preview with a select group of customers. We expect to release the feature to the public later this Fall, and will update here when we are starting to roll out to all customers. We appreciate all the feedback you have provided to us on this forum and thank you for your patience.
27 votesPete commented
This is an essential feature, you should be able to choose call me back as the default over pc audio, that way you also wouldnt get an echo and could control phone audio from the app....