Skype for business and Outlook calender

Hello!

When i try to schedule a meeting in Outlook 365 i get this message:

"Skype for business

You can not schedule the Skype meeting because you are not

UC-enabled or it may have occurred

configuration issues with your account. Make sure you are

signed in with the same account you use for Microsoft

Outlook. Contact the support team if the problem persists."

How do I get UC-enabled?