Every once in a while I come across one of those handy computing tips that are almost impossible to find but that can relieve hours of headaches. If you’ve upgraded your workstation to Windows 10, use the new Microsoft Edge browser and have a need to create and or test some website designs or other projects locally using your local IIS http://localhost instance, you’ll find that the Edge browser can’t connect.
You might spend hours trying to figure out which firewall setting has it blocked only to discover it’s not firewall related. Microsoft Edge browser runs with network isolation by default for security reasons. To fix the issue, open a command prompt as an Administrator and enter the following command:
CheckNetIsolation LoopbackExempt -a -n=Microsoft.Windows.Spartan_cw5n1h2txyewy
Once you do this, you’ll be able to view localhost from the Edge browser without any issues.