While I have been using authnet for some time I never had a call to use the e-check option until now. I get it except for one thing. When you are setting x_recurring_billing to true how (or where) do you tell authorize.net when to rebill the account.
My situation could call for rebilling either monthly or yearly. I have read over the developer guide and it's plain as day how to set the transaction to a rebilled one but for the life of me I can find how to set the duration before the rebill.
Many thanks!
