If we’re talking about an external access we can take a glance into TMG logs or use on Microsoft Remote Connectivity Analyzer tool which can provide information for us, But, when we have internally issue we can check some logs file that might help us.
Sometimes when we are experiencing signs-in issues with Skype for business, we have to find out what is the problem and find a way to fix it. This tutorial going to be very quick but very efficient. How to enable full logging level in the Skype for business client side?
