504 Gateway Time-out when Getting B2C Users List (80K) using MS Graph in Asp Dot Net core WebApp

Question

Hello All,
I am getting 504 Gateway Time-out Error when fetching B2C Users List which is >80K. The same worked fine for around 4k users, with a little wait, and works even more smooth with less than 2k users while testing.

Is there any suggestion to handle such huge Users List? Code snippet is below:

      public async Task<List<User>> GetAllUsers()  
    {  

        List<User> userResult = new List<User>();  
        UsersModel signin = new UsersModel();  
          
        var graphClient = await GetGraphServiceClientAsync();  
        var users = await graphClient.Users.Request().Top(999).Select(e => new  
        {  
            e.DisplayName,  
            e.CreatedDateTime,  
            e.Id,  
            e.Identities,  
            e.UserPrincipalName,  
            e.OtherMails,  
            e.Mail  
        }  
        ).GetAsync().ConfigureAwait(true);  

        userResult.AddRange(users.CurrentPage.OrderBy(e=>e.CreatedDateTime));  

        while(users.NextPageRequest!=null)  
        {  
            users = await users.NextPageRequest.GetAsync();  
            userResult.AddRange(users.CurrentPage.OrderBy(e=>e.CreatedDateTime));                 
        }  
        return userResult;  
    }  

Answer 1

• Try with smaller pagination and see if it helps
• When you see failure see if you can re-try the same API and if it succeeds or not
• Outside of your code, can you repro the issue with Microsoft Graph Explorer/POSTMAN as well?