Skype for Business failing

I am in IT support, and I have a user that is having an issue with Skype for Business. When she goes into Outlook and tries to set up a Skype meeting it says Create Skype Meeting failed. Please make sure that Skype for Business is running and signed-in and try again. Does anyone know why this is happening? She is logged into her Skype profile so i know that is not the issue. Any help on this would be great.

I was able to fix this issue by running a repair in add and remove programs. Something must have just gotten corrupted at some point on it.