To create a Team go to Teams page and click on create new team button
Next step is to name the team and click save.
Now that you have created a Team you can assign users to it.
On any Dashboard click on the name of the user you need to assign to a Team, on the far right of their row click on three dots and select Edit.
On Edit window you will find Team box. Upon clicking on it you will be able to choose which Team to assign the specific user to.
Note: Alternatively, you can create and / or assign user to a Team when adding personal computer users from Employees dashboard.