If you are one of them, you should know that this may because by one of three causes: Some users have reported encountering issues when trying to log into the desktop version of Power BI.

Power BI is being blocked by your Firewall

Make sure Power BI is added in the exception list of your Firewall:

How do I fix proxy authentication errors

Whitelist the appropriate domains

For proxy authentication servers If your network uses a proxy authentication server, whitelisting these domains on the proxy authentication server will most likely fix the issue: For those part of government clouds If your network is part of government clouds , whitelisting these domains on the proxy authentication server will most likely fix the issue:

Non-HTTPS URL redirect errors

Use secure connections for authentication

Most recent versions of Power BI Desktop use the latest version of the Active Directory Authentication Library (ADAL), which does not allow a redirect to non-secured URLs. As a measure of precaution, let your administrator know he should check that secured URLs are used for their authentication sites. Use the Web version The web version of Power BI is the first one to automatically update. So if you find any issues with the desktop version, just switch to the web version.

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