In the event GM is down in one data center, trading partners will be able to continue to access their Global Mailboxes. Partners can continue to download already processed files from their Consumer Mailbox, and continue to upload new files in their Producer Mailbox. While GM is down, there is no replication of files across data centers. Replication is a pre-requisite to processing of files through B2Bi/SFG. If no replication is happening, no files will be processed through the system. Once GM comes back up in the down data center, the files that have been queued in GM mailboxes will be replicated across data centers and processed by B2Bi/SFG.