Office 365 (Skype for Business) - Change Your Availability
Presence statuses include Available, Busy, Away, and Do Not Disturb. Your status is based on your Microsoft Outlook Calendar. For example, if you have a meeting currently scheduled in Outlook, your status appears as “In a meeting” in Skype for Business. When you’re in a Skype for Business audio or video call, your presence indicator appears red, as Busy, and your status is updated to “In a call.” You can also manually set your presence status to control how or whether you want people to get in touch with you. And, your presence can also include a personal note that appears in your Contacts list and on your contact card. This gives people more information about what you’re up to.
· Click the status menu drop-down arrow below your name on the Skype for Business (Lync) main window, and then click the status you want to show other people.