Microsoft's Edge browser fails to connect on Windows 8 and newer computers when the Symantec Endpoint Protection (SEP) client is configured to use Web Security Service (WSS) Traffic Redirection (WTR).
Microsoft Windows
Edge browser
The SEP client's WTR functionality configures the client to send all Web traffic on port 443, and 80 to a local proxy service listening on port 2968. This traffic is then forwarded to the WSS infrastructure.
Edge runs as a Windows modern app different from IE and thus it is has network isolation by default for security reasons.
Create an exemption to allow the Work or school account Windows App to connect to localhost.
CheckNetIsolation.exe LoopbackExempt -a -n=Microsoft.MicrosoftEdge_8wekyb3d8bbwe
CheckNetIsolation LoopbackExempt -a -n=Microsoft.Windows.Spartan_cw5n1h2txyewy
checknetisolation.exe LoopbackExempt -s
Name:
Microsoft.MicrosoftEdge_8wekyb3d8bbweSID: S-1-15-2-3624051433-2125758914-1423191267-1740899205-1073925389-3782572162-737981194
Name:
Microsoft.Windows.Spartan_cw5n1h2txyewySID: S-1-15-2-3940530315-3680572922-3580967311-3604442549-2808734947-326342994-2786341419