When you install Outlook on the Enterprise Vault server, you must create a profile and connect to an Exchange Server mailbox before you install Enterprise Vault.
If the target Exchange server is Exchange Server 2007, it must have a Public Folder store created to enable connections from versions of Outlook earlier than Outlook 2007. If you selected the option to support older clients when you installed Exchange Server 2007, a Public Folder store will have been created automatically.
If a Public Folder store does not exist on the target Exchange Server 2007, you must create one manually to enable Outlook 2003 on the Enterprise Vault server to connect to the Exchange Server.
To create a Public Folder store manually
new-publicfolderdatabase -Name "Public Folders" -StorageGroup "First Storage Group" -EdbFilePath "C:\Program Files\Microsoft\ExchangeServer\Mailbox\First Storage Group\Public Folders.edb"
Type the following command to mount the Public Folder database:
You may need to create an Offline Address Book with Public Folder integration enabled if you are using clients prior to Outlook 2007.