Upon logging onto your desktop or laptop, Skype should automatically sign-in as you . However, if this does occur, follow the below steps to get signed in.
Logon to Skype
There are 2 ways to launch Skype for business.
1) Click on start, search for "Skype" and select
2) Click on the tray icon arrow( by the time clock). Right click the Skype icon and select "Sign In"
If prompted to do so, sign in using your full email address and computer password