You can set up Enterprise Vault so that it archives all messages that the Microsoft Exchange Server system sends and receives, provided that the messages are passed to one or more specific Microsoft Exchange journal mailboxes.
The Exchange Journaling task runs continuously, checking for items in journal mailboxes and immediately archiving them. These items are deleted from the mailbox as they are archived and no shortcuts are created.
It is important that you monitor journal mailboxes to make sure that items are archived promptly. It is especially important that you do this if you have suffered some sort of system failure which required a system restart.
If you are running an Exchange Journaling task, messages in the journal mailbox should be archived soon after they arrive in the mailbox.
Check that there are no messages in the Inbox folder that are older than one day. If there are any messages older than one day, then there is likely to be a problem.
Look in the following Failed to... folders, which are under the Enterprise Vault Exchange Journaling Task folder:
Install the required codepage on the Exchange Journaling task computer.
To prevent a similar problem from happening on Exchange Mailbox task computers, install the codepage on each Exchange Mailbox task computer.
If you use a building blocks configuration, repeat the changes on every Enterprise Vault server in your site.