Power BI Desktop login fails when using DisableUpdateNotification registry key and proxy

[Anonymous]

We use a non-transparent proxy server (proxy settings are setup in the Internet Options). I can login to the PowerBI Desktop application just fine by default. But if I set the registry key to disable update notifications (see below) the login suddenly fails with the message:

Unable to sign in

Your network requires proxy authentication. Please contact network admin to check your authentication and firewall settings.

In the trace I can see that the proxy is asking for authentication (I removed lots of the log for simplicity reasons).

DataMashup.Trace Information: {"Start":"2019-02-14T20:02:32.0076063Z","CloudConfigurationManager.SetCloud; discovery URI: https://api.powerbi.com/powerbi/globalservice/v201804/environments/discover?user=someuser%40somedoma..."
DataMashup.Trace Error: {"Start":"2019-02-14T20:02:32.0373302Z","HttpService: WebExceptionStatus = ProtocolError, WebException = {\"ClassName\":\"System.Net.WebException\",\"Message\":\"The remote server returned an error: (407) Proxy Authentication Required.\"

This is the registry key that is set:

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Microsoft Power BI Desktop\

Name: DisableUpdateNotification

Type: REG_DWORD

If the value is 0 it works fine, it correctly authenticates to the proxy and logs me in. If the value is 1 it suddenly tries to reach the URL directly without using the proxy which ends up with the proxy throwing the error above.

[v-qiuyu-msft]

Hi @Anonymous ,

Have you contacted your Network admin for help? 

If you don't use non-transparent proxy server, are you able to sign in in Power BI desktop after you disable update notifications? 

I didn't find the DisableUpdateNotification key on my side, please remove non-transparent proxy server then check if this key disappears from the registry. 

Best Regards,
Qiuyun Yu