"Skype for Business does not work with my Mac"
In connection to the name change in 2017 from "University College Zealand" to "University College Absalon", the old licenses were replaced with new ones.
All Windows PC's made this change successfully, however the Mac computers has shown to be having some difficulties. (It's not able to automatically replace the license key)
If Skype for Business does not work on your Mac computer, you need to uninstall the current version of Skype for Business, by means of the tool Clean my Mac, which will be able to remove all references to the program.
Notice: If you are an employee at University College Absalon, Digital (helpdesk) is able to help you uninstall the current version of Skype for Business.
Afterwards you need to reinstall Skype for Business.