SQL Azure connection failure

I'm getting the following error message when attempting to connect to the AZURE hosted bank through a WEB application:

  

An exception has been raiset that is likely due to transient failure. If you are connecting to Sql Azure database, consider using SqlAzureStrategy.

I disabled the bank's firewall to see if this could be the problem, but it did not resolve.

I am able to connect through SQL Server Management Studio, but not through the application.

The application connects to a bank through EF6

var usuario = Db.Usuario.Where(x => x.Login == login).FirstOrDefault();
            if (usuario != null && usuario.ProfissionalID.HasValue)
            {
                usuario.Profissional = Db.Profissional.Where(x => x.ProfissionalID == usuario.ProfissionalID).FirstOrDefault();
            }
            return usuario;

I saw in a Microsoft article to implement this code snippet to solve the problem:

public class DbContextConfiguration : DbConfiguration
    {
        public DbContextConfiguration()
        {
            SetExecutionStrategy(
                "System.Data.SqlClient",
                () => new SqlAzureExecutionStrategy(1, TimeSpan.FromSeconds(30)));
        }
    }

I did this, but it seems to me that he makes several connection attempts to each, until one is successful.

But it seems to me that the server is unstable, since I could not get a connection, using SqlAzureExecutionStrategy.

Now I've received another error message:

Maximum number of retries (1) exceeded while executing database operations with 'SqlAzureExecutionStrategy'.