IDA code works perfect on local but not on server

Hi Suchita Jain,

From what I've seen, the error indicated that the OpenID Connect middleware couldn't download the OpenID configuration document from Microsoft's discovery endpoint (/.well-known/openid-configuration).

This may happen because:

• Network connectivity issues (firewall, proxy, no internet access)
• Timeout - the request took too long to complete
• DNS resolution problems
• SSL/TLS certificate validation failures

Since the task is cancelled, I suspect it means either:

• Timeout - The HTTP request exceeded the allowed time limit
• Network blocking - Outbound connections to Microsoft endpoints are restricted
• Cancellation token - The operation was explicitly cancelled due to application shutdown or timeout

Here's how you can troubleshoot this issue:

Network and Firewall Issues

Outbound Connection Restrictions: Your server likely can't reach https://login.microsoftonline.com. Check if:

• The server has internet access
• Corporate firewall is blocking outbound HTTPS connections
• Network security policies restrict access to Microsoft endpoints

Solution: Whitelist these Microsoft endpoints in your firewall:

• *.login.microsoftonline.com
• *.windows.net
• *.microsoftonline.com

Timeout Configuration

The default timeout might be too short for your server environment.

Solution: Increase the timeout in your OpenID Connect configuration:

services.AddAuthentication(OpenIdConnectDefaults.AuthenticationScheme)
    .AddOpenIdConnect(options =>
    {
        // Your existing configuration
        options.Authority = "https://login.microsoftonline.com/{tenant-id}";
        options.ClientId = "your-client-id";
        
        // Add timeout configuration
        options.BackchannelTimeout = TimeSpan.FromSeconds(60);
        options.BackchannelHttpHandler = new HttpClientHandler()
        {
            ServerCertificateCustomValidationCallback = (message, cert, chain, errors) => true // Only for testing
        };
    });

SSL/TLS Certificate Issues

Server environments often have stricter certificate validation.

Solution: Configure HttpClient to handle certificates properly:

services.AddAuthentication(OpenIdConnectDefaults.AuthenticationScheme)
    .AddOpenIdConnect(options =>
    {
        // Your configuration
        options.BackchannelHttpHandler = new HttpClientHandler()
        {
            ServerCertificateCustomValidationCallback = HttpClientHandler.DangerousAcceptAnyServerCertificateValidator // Only for testing
        };
    });

Proxy Configuration

If your server uses a proxy:

services.AddAuthentication(OpenIdConnectDefaults.AuthenticationScheme)
    .AddOpenIdConnect(options =>
    {
        var handler = new HttpClientHandler();
        handler.Proxy = new WebProxy("your-proxy-address:port");
        handler.UseProxy = true;
        
        options.BackchannelHttpHandler = handler;
    });

DNS Resolution Issues

Solution: Try using IP addresses temporarily or check DNS resolution:

nslookup login.microsoftonline.com

Async Configuration Issue

Ensure your Startup.cs doesn't have blocking async calls:

// Avoid this pattern
public void ConfigureServices(IServiceCollection services)
{
    // Don't use .Result or .Wait() in startup
    services.AddAuthentication()...
}