HP E5300 Messaging System is the industry's first fully self contained platform built for the next-generation of Microsoft Exchange to deliver enterprise-class messaging to businesses of all sizes. Built as a turnkey solution that can be up & running in a few hours vs. days, the HP E5300 Messaging System gives business users the experience they want most: large mailboxes, centralized archiving of mailboxes files & 24 x 7 access from any device. IT staffs benefit the solutions simplicity to setup, scale & manage & to meet demands affordably. Ideal for multi-site enterprises as well as branch office & remote office environments, each HP Messaging System delivers greater simplicity & accelerates deployment with preconfigured solutions starting at 500 mailboxes up to 3000 mailboxes, while delivering large, 1 to 2.5 GB mailbox sizes. Clients can grow by adding storage capacity or more appliances within the environment up from hundreds to as many as 15, 000 mailboxes.