Create Space = Chats. Use the plus sign to create a new thread.
Teams = collection of contacts in a shared space. Use the plus sign to create a team.
Contacts. Click the Add a contact button or right-click in an open area to add contacts. You can create a group of Top contacts for people you communicate with more frequently.
Calling. This is where you will find your call log and dial pad.
Voicemail. This is where your voicemails can be seen. The icon in the upper right will dial your voicemail portal.
The calendar icon is where you will find meetings. Your Personal Room link can be copied and sent to a contact. The buttons in the middle of the screen allow you to Start a meeting, Join a meeting, and Schedule a meeting.