Follow the steps detailed on this guide in order to setup your Skype for Business App on your Android Device
Open Play Store app and search for the Skype for Business for Android application.
Accept the Terms of Use.
Click on the button below to hide/show this information.
On the"Welcome" screen, type over the arrow to sign in.
Type your organization sign-in address, be aware this will be your tuiad username@tuigroup.com.
Then tap on Advanced options.
Type your tuiad user name (name.surname@tui.com). Tap over Advanced options to get back to the sign in screen.
Type your tuiad password (same as Windows / Outlook) and press over the arrow to sing in.
If a Security Warning is shown, check the "always trust this certificate" option and tap over "Continue"
Introduce your phone number and click over the arrow to finish the sing in process.
The Skype for Business application will be opened.
Click on the button below to hide/show this information.