FedEx will be performing maintenance on their live shipping rate (API) servers on Saturday, July 16 from 9 PM central time to 1 AM central time (Sunday, July 17th). During the scheduled 4 hour maintenance window, live shipping rates generated by the FedEx API may be unavailable. If you only use FedEx to quote shipping rates on your Site Store Pro online store, you should prepare to use an alternate rate provider such as UPS or USPS, use flat-rates for your shipping calculations or put your store into maintenance mode during the FexEx scheduled downtime period.  Otherwise, your customer's could receive an error message when checking out since no values may be available for shipping rates. If you are using other providers in addition to FedEx, the scheduled maintenance window most likely will not affect your store operation except that your customers will not be able to select FedEx shipping options if the FedEx API is not returning rates from JULY 16TH 9PM CT -JULY 17th 1 AM CT.