For getting started with Skype for Business, including how to install it on Windows, read Getting Started with Skype for Business at Trinity.
If you want to schedule a Skype for Business meeting from within Outlook you will also have to make a change to your account settings in Outlook. Be sure to read to the end to see the details.
In order to login to Skype for Business on many mobile and MacOS apps, you will need both your full email@example.com address and password, AND, under “Advanced options,” your shorter firstname.lastname@example.org filled in for “Signing in as.”
When you open the app for the first time, your sign in screen should look like this (more or less):
Tap or click on “Advanced options” to access the “Signing in as” setting, where you will enter your email@example.com (typically your first initial and last name):
Then return to the previous screen and enter your full firstname.lastname@example.org and password:
You should now be able to log in to Skype for Business. Commence communicating.
Scheduling a meeting from Outlook
Once properly configured scheduling a meeting is simple as described in the main Skype post. But first you will need to change your account settings as follows:
Under the Tools menu choose Account. On that screen change your email address from the default of email@example.com to firstname.lastname@example.org.