sophos utm - Skype

Question

Good evening, 
 I'm having problems in the release of Skype. Sometimes it does not connect and sometimes it does not send messages. Already I realized several skips, but without success. Can someone help me. 
 Thank you.

AdamMickiewicz · Answer

I think you may have SSL scanning enabled in web proxy and this most likely causes the problem. I have created following exception list in the web filtering for Skype and it seems to work fine. List of IPsbased on Microsoft's official list of Skype for Business IP/URL. Hope this helps! 
 Skipping: SSL scanning / Certificate trust check / Certificate date check Matching these URLs: ^https?://[A-Za-z0-9.-]*\.skype\.com/ ^https?://157.55.*/ ^https?://157.56.*/ ^https?://65.52.*/ ^https?://13.107.*/ ^https?://23.101.*/ ^https?://23.102.*/ ^https?://23.103.*/ ^https?://40.68.*/ ^https?://40.78.*/ ^https?://52.112.*/ ^https?://65.55.*/ ^https?://66.119.*/ ^https?://104.40.*/ ^https?://104.44.*/ ^https?://111.221.*/ ^https?://131.253.*/ ^https?://132.245.*/ ^https?://134.170.*/ ^https?://191.233.*/ ^https?://192.234.*/ ^https?://207.46.*/