From Microsoft Corporation
MC229071, Stay Informed, Published date: Dec 9, 2020
Feature update, User impact
Microsoft Teams will soon support multiple numbers for a given user when dialing from the chat header.
This message is associated with Microsoft 365 Roadmap ID 66194.
When this will happen
We will roll this out in mid-December.
How this will affect your organization
A new split button in the chat header for audio/video calling displays multiple numbers for a single contact, giving users more than one numbers with which to initiate a call.
What you need to do to prepare
You might want to notify your users about this new capability and update your training and documentation as appropriate.