Hello,
According to the error message, please try sign out and sign into a new account.
- If it is a newly installed VS, please close all running VS instances and go to Visual Studio Installer > More > Repair VS.
- It also might be because your proxy server doesn't prompt for credentials for `http://go.microsoft.com` addresses, but it does so for
*.visualStudio.microsoft.com
addresses. For these servers, add the following URLs to an allowlist to unblock all sign-in scenarios in Visual Studio:
*.windows.net
*.microsoftonline.com
*.visualstudio.microsoft.com
*.microsoft.com
*.live.com
We recommend that you remove the `http://go.microsoft.com` address from the allowlist. Removing the address allows the proxy authentication dialog to show up for both the `http://go.microsoft.com` address and the server endpoints when Visual Studio restarts.
Best regards,
Molly
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