In my ASP.net Core MVC 8 application, I am using Microsoft Graph to get a list of members of an Azure Active Directory group. The authentication used is Microsoft Entra. How come when I try to call the Graph API in my controller, this error gets thrown? System.InvalidOperationException: ‘Unable to perform redirect as Location Header is not set in response’

How can I set the Location Header?

public async Task<dynamic> GetGroupMembers(string groupId)
{
    try
    {
        var scopes = new[] { "https://graph.microsoft.com/.default" };
        var options = new ClientSecretCredentialOptions
        {
            AuthorityHost = AzureAuthorityHosts.AzureGovernment
        };

        var clientSecretCredential = new ClientSecretCredential(configuration["TenantId"],   configuration["ClientId"], configuration["ClientSecret"], options);

        var graphClient = new GraphServiceClient(clientSecretCredential, scopes);

        // this is where the error gets thrown
        var members = await graphClient.Groups[groupId].Members.GetAsync();
    }
    catch (Exception ex)
    {
    }

    return null;
}

So far I have used Microsoft’s documentation on how to create a graph client using the Tenant ID, Client ID, and Client Secret provided by my security team. I have also set my client credential to use the Azure Government host. (Source: [https://learn.microsoft.com/en-us/graph/sdks/create-client?tabs=csharp](Microsoft Graph Client))

The group ID I am trying to get members of is the application’s assigned group, which was set by security in the Azure Portal. I am able to get the group’s ID through my claims since I am a member of the group.