How to use Microsoft Teams Walkie Talkie

Tap on the Walkie Talkie Icon to open it.

Tap "Add channels" to select channels to join.
(You would just select the floor or building you are working in.)

Tap next the channel to join the channel.
(In my example, I just joined our helpdesk channel, but for you, you may have multiple buildings and floors to choose from.)

Click done in the top right to close this menu.

In order to use the walkie-talkie, you must open the phone and open the app, and hold the big blue button to talk.
(Only one person may speak at a time, and you will be prompted to wait when someone else is talking.)

Here is what it will look like when you are talking.

To view the members of the walkie-talkie channel, you may tap here, and it will show every member who will receive your communications.

(Managers will be monitoring this periodically to make sure all staff are present.)

Here you can see it only shows me present, but if there were other members, you would see more.