The USPS® is issuing a MANDATORY software update for the PostalOne! production system this weekend. This update will be implemented on Sunday, January 7, 2018. The PostalOne! Production (PROD) system will not be available during this update process, on Sunday morning January 7, 2018 from 12:01 AM to 10:00 AM CT. PostalOne! will then be updating the Test Environment for Mailers (TEM) on Monday, January 8, 2018 from 9:00 AM to 12:00 Noon CT and TEM will be unavailable during that update period.
Read more: https://www.windowbook.com/Learning/Postal-Concierge-E-tips