Microsoft has released a Knowledge Base article 955690 that notifies the kinds of files that are unsupported on a home network that uses Windows Home Server. These files include Microsoft Office Outlook personal folder files (.pst) and database files. Additionally, it discusses other computer programs that may not be designed to work on a home network that uses Windows Home Server.
Outlook .pst files: The Microsoft Exchange Server team created .pst files to let users maintain a copy of their e-mail messages on their local computer. These .pst files also serve as message storage for users who do not have access to an Exchange server. For example, you can use Outlook as a front end to an Internet hosted mail service. However, the .pst files are unsupported over a local area network (LAN). Therefore, we recommend that you not store .pst files on Windows Home Server.
For more information, click the following article number to view the article in the Microsoft KB297019 Personal folder files are unsupported over a LAN or over a WAN link.
If you do decide to use your Windows Home Server home computer to store your .pst files, we recommend that you use the Windows Home Server backup solution to create a backup copy of the files. For more information about the backup function and about the restore function in Windows Home Server, see “Technical Brief for Home Computer Backup and Restore.”