Introduction
Download the Skype for Business app from https://apps.apple.com/us/app/skype-for-business/id605841731. Sign in using your eRaider account. Type your mobile phone number when prompted.
Instructions
1) Download and install Skype for Business from the App Store at https://apps.apple.com/us/app/skype-for-business/id605841731.
2) Open the Skype for Business app.
NOTE: The app has the Skype logo, but it appears as "Business."
3) If prompted, choose OK if you would like to allow Skype for Business to access the contacts stored on your device.
4) Tap the arrow to go to the next step.
5) Tap OK.
6) Type your TechMail address. Then, tap the arrow.
7) Type your eRaider password. Then, tap Sign in.
NOTE: Switching on Save Password will prevent you from having to type in your password each time you open the app.
8) Type your mobile phone number. Then, tap the arrow.
Outcome
You have downloaded and set up Skype for Business on your iPhone or iPad.