Azure AD Pass-Through Authentication Issues

I am having issues with Azure AD pass-through authentication. I've went through the process of enabling Pass-Through Authentication and it says that my Azure AD and Local AD have synced correctly and are enabled, but when I create a user in my local AD, it does not sync with my Azure AD. I am not receiving any kind of error issues and it appears everything it running correctly.  I am currently running Windows Server 2016. Any ideas?