Hello, I need help with a Squid ver. 4.15 used with kerberos authentication to 
windows, whitelists and cache_peers to McAfee Web Gateway appliances.
Everything works, except for a teams add-on integrated in Outlook, i.e. when a 
teams meeting is created from Outlook it does not open Teams correctly, and 
therefore the relative part with the Teams Meeting ID is not seen in the email.
Consulting access.log you can see numerous TCP_DENIED/407 errors even if 
previously there was TCP_TUNNEL/200 with the connect. It is not clear if this 
error, which seems to be extended to other urls that have nothing to do with 
Teams, Outlook and Microsoft, is indicative of this issue. Considering that 
navigation (for permitted sites) happens perfectly.
We can neglect the peer component of the McAfee Web Gateway as the old TMG 
proxies that we are discontinuing point to the same appliances, and do not have 
this problem.
Thanks to anyone who can suggest a solution.

--
Alessandro Baritello
Managed Operations – Cloud & Technology Services
alessandro.barite...@eng.it<mailto:giovanni.bomb...@eng.it>

Engineering D•HUB S.p.A. - Gruppo Engineering Ingegneria Informatica S.p.A.
Corso Mortara, 22 – 10149 Torino
www.eng.it<http://www.eng.it/>

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