Make an outbound call using another phone number with Microsoft Teams

In this post I describe a recent Teams calling update which enables users to dynamically decide and make outbound calls with another phone number. The feature just showed up in my Microsoft Teams App for Windows. In May 2022 I already wrote another post that this feature is on the roadmap.



By default you can only assign one phone number to an enterprise voice enabled user in Microsoft Teams. If a user must suppress his number (DID) a Teams Admin can assign a Caller ID Policy but that’s static.

Using collaborative calling in a Teams channel already allowed to make outbound calls with another phone number but this had some other tradeoffs, e.g. calls could not be received from all Teams clients like Teams on the web or on the mobile.

How to call out with another phone number in Microsoft Teams?

Today, if you are member (agent) of a Teams Call Queue you can make an outbound call dynamically. To call out using another number do the following:

  • Open the Teams call toast
  • Enter a phone number you would like to call
  • Click on the drop-down on the right besides the call button
  • Click with which number you want to call out
  • That’s it!
Source: Screenshot Microsoft Teams App on Windows July 2th, 2022

Notes for Teams admins

That it works the user must be member of a Teams Call Queue (CQ).

Furthermore in the Teams CQ a Teams resource account must be added.

Source: Screenshot Microsoft Teams Admin Center \ Call Queue \ Assign calling ID

Depending on your Teams calling deployment (calling plans, direct routing, operator connect) the Teams Resource Account must be able to make an outbound call. In case of direct routing you need to assign the suited Teams Online Voice Routing policy. For calling plans you need to assign calling plans (plus communication credits).

Additional resources


  1. Hi Erik, thanks for the nice summary. Something to keep in mind: when you use Users, Groups or both instead of a Team/Channel to add the agents to the queue, the additional Calling Line ID will still show up in the Calls App / DialPad. However, in my tests, using it for outbound calls did not work unless you configure a Team/Channel as Agent List.

    Also, that’s the second time I read somewhere that using collaborative calling would only deliver calls to the Teams Desktop Apps. Where did you get this info from? It doesn’t matter which method you chose, Team/Channel, Users, Group or Group and Users, in the end, Teams will expand the Team and all Enterprise Voice Enabled users to the CQ “internal” AgentList. Agents will still receive calls on Mobile, Web, Desk Phones even when Voice Enabled Channels are used. Users can still Opt-In/Out from CC Queues through Settings when using the Mobile, Web or Desk Phone Apps. Only the Calls Tab inside the Channel is not visible on devices other than Desktop. On Mobile, additional Calling Line IDs have been available through the Calls App before it was rolled out on Desktop.
    More info about CQ Agent Lists here:


    • Hi Martin,
      Thank you for your comment.

      That’s an interesting point in my tests above agents where direct CQ members (added as users). I could change it to a collab calling channel and back, just to see if it makes any difference that the CQ object gets updated.

      Regarding the collab calling there is a compat. list by Microsoft docs (link below) showing that it is only supported/working Windows, Mac and VDI clients. I tested this in an early stage in March 2021. Maybe this is no longer up-to-date?


      See also


      • Hi Erik,

        I noticed the first point because I wanted to set it up for a customer and I couldn’t get it to work without using CC assignments.

        Ah I see, I also saw that compat list. I think they just mean that the Calls Tab within the channel is not supported on Mobile, Web, Ip Phones etc. We use a CC Queue in Production and I’m 100% sure that calls from a CC queue can be received on mobile because I answer a lot of them on mobile.

        I just wanted to ask why you thought that calls from CC queues only hit desktop users but now it’s clear.


        • Hi Martin,
          Thank you for your feedback.

          I made some further tests in my lab. 😀
          Making outbound calls worked in both scenarios, i.e. (test 1) agents added directly in a CQ and (test 2) agents being part of a Teams channel. What I did not test is if there is a difference adding users in group to a CQ.

          Moreover, I tried calling a CC with Teams mobile app users-only. It worked (on iOS). I’m excited about this. 🙂 However, I will still be cautious because I’m not sure if this is or could be subject to change? I might just open a request via Git to update the documentation.


Comment / Kommentar verfassen

Please log in using one of these methods to post your comment: Logo

You are commenting using your account. Log Out /  Change )

Facebook photo

You are commenting using your Facebook account. Log Out /  Change )

Connecting to %s

This site uses Akismet to reduce spam. Learn how your comment data is processed.