If you see your contact’s presence is green, it is usually acceptable to start a conversation through IM and then add audio or video if needed. If your contact is red or yellow and you want to be able to catch that person as soon as the person is green. The most efficient way to solve this problem is by tagging your contact for status change alerts. When you tag a contact, you get a notification when your contact's presence status changes. Here is how:
- From the Contacts tab in Skype for Business, right click on the contact.
Click Tag for Status Change Alerts as illustrated in the figure right below.
When your contact changes his status, you get a pop-up alert on your screen.
If you no longer want to be alerted of status changes, just right-click on the contact and click Tag for Status Change Alerts to disable the alert.