The Microsoft Store app fails to connect with Endpoint Protection Web Security Service Integration enabled
Last Updated March 04, 2019
The Microsoft Store app 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).
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.
Microsoft apps (self-contained applications downloaded from the Microsoft Store) cannot connect to localhost by default.
Create an exemption to allow the Work or school account Windows App to connect to localhost.
Close any open Microsoft Store windows, or error messages related to the Microsoft Store
Issue the following command from an elevated command-prompt: CheckNetIsolation.exe LoopbackExempt -a -n=microsoft.windowsstore_8wekyb3d8bbwe
Confirm the application exemption applied correctly:
Issue the following command from an elevated command-prompt: checknetisolation.exe LoopbackExempt -s
The list of exempted applications will include the following on a successful attempt: Name: microsoft.windowsstore_8wekyb3d8bbwe SID: S-1-15-2-1609473798-1231923017-684268153-4268514328-882773646-2760585773-1760938157
Restart the Office application and confirm you are able to open and connect to the Microsoft Store
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