Step 1: While in the Teams application, you will notice the Teams button on the left-hand side of the screen. Click this to view all teams you have access to.
Step 2: Each team has a square with 3 horizontal dots in the top right corner. You can click these dots and select “Add Member”.
Step 3: Type in the name of the person you wish to add, select that person, and then click the purple “Add” button to the right of the search box.