Please see our Knowledge Base article for more information. KU has implemented "open federation," which means you can connect with other Skype for Business users at more than 800 institutions around the world that also have open federation.
If you're not sure if the other person's organization has open federation, contact them first by phone or email to ask.
Changing your primary email address (Skype for Business login) can cause issues with Skype for Business' "presence" function and with reoccurring Skype for Business online meetings you have already scheduled.Skype for Business is an easy-to-use interface that allows users to communicate through text chat, voice calls, video calls and online meetings.You can use Skype for Business from nearly any Windows PC or mobile device (Lync on Macs or mobile devices), on campus or anywhere in the world you have Internet access.We will be investigating solutions for chat-based “service desk” type functionality as a later phase of the Skype for Business project. There are two options to place calls off campus: 1) If you have a laptop computer, you can place calls via Skype for Business anywhere you have an Internet connection using a Skype for Business headset, or other compatible device, or your computer's microphone and speakers .2) You can also download the Skype for Business mobile app to place calls from your work phone number via your mobile device.