Refer to the following instructions when initially setting up Skype for Business on an Android. Download and install the Skype for business from the Google Play store.
Open Skype for Business and Tap the arrow when prompted. Tap OK on the introduction page to begin signing in.
In the Password field, enter your Identikey password, then tap the Sign In button. You can decide here whether you want the app to remember your password going forward.
Enter your phone number and tap the arrow when finished.
The Skype for Business homescreen will appear once you're successfully signed in