Let's say you have an important question for a co-worker and have stopped by her office multiple times only to find her in a meeting or away. It's inefficient to continually walk by the office, so how can you talk to her as soon as she becomes available without having to schedule a special meeting?
Skype for Business includes a tagging feature that allows you to tag people for alerts when their status changes. The alert is a pop-up on your screen with the contact's picture and a message that tells you the status has changed. If the person you've tagged isn't already in your contacts list, they'll be added to it.
Tag a contact for status change alerts
Go to your contacts list or use the search field to find the person you want to tag.
Right-click their contact information and select Tag for Status Change Alerts.
Untag a contact
If you no longer need to be notified of a person's status changes, you can untag them to stop the alerts. There are two ways to untag a contact. Either click Untag when the alert pops up or follow the steps below.
Go to your contacts list.
Right-click the person's contact information. and select Tag for Status Change Alerts.
Note the checkmark next to Tag for Status Change Alerts. Click it to untag the contact.