1. Download the Skype for Business app via App Store.
2. Start Skype for Business on your mobile phone.
3. Fill in your login: (firstname.lastname@example.org) and Password: (Umu-id password)
4. Click on Advanced options and fill in your Username: (Umuemail@example.com)
5. Back up one step and click on Log in.
6. The first time you start the app on your iPhone/iPad you must write in your mobile telephone number.