Msal Login Mode

The framework defaults to pop-up login mode and falls back to redirect login mode if a pop-up can't be opened. Configure MSAL to use redirect login mode by setting the LoginMode property of xref:Microsoft.Authentication.WebAssembly.Msal.Models.MsalProviderOptions to redirect:

builder.Services.AddMsalAuthentication(options =>
{
    ...
    options.ProviderOptions.LoginMode = "redirect";
});

The default setting is popup, and the string value isn't case-sensitive.