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  • markparris 12:25 pm on March 31, 2010 Permalink | Reply
    Tags: , , , , , PST,   

    Microsoft Whitepaper: The Microsoft Exchange Large Mailbox Vision 

    This recent whitepaper from Microsoft discusses having large mailboxes without breaking your budget and keeping e-mail on the Exchange Server instead of allowing it to be scattered in Outlook Data Files (.PST files). By centrally storing email on the Exchange server it  helps reduce the risk of data loss; improves regulatory compliance and increase productivity among both workers and IT staff.

    It made some quite interesting reading and provides “food for thought


    • robertsilver 12:41 pm on April 1, 2010 Permalink | Reply

      Thanks Mark

      Certainly a long time comming with Google offering enormous mailboxes for ‘free’. Surely Enterprise customers can do better and this as a step in the right direction. Centralised archiving, retention and DR capabilities have been lacking in the past with users archiving their mail to their laptops.


      Rob Silver


  • markparris 11:42 am on February 3, 2010 Permalink | Reply
    Tags: , , , PST   

    Did you know PST’s are not supported over a LAN or a WAN? 

    A little known fact that can cause Windows client performance issues: Outlook PST files are not supported on network drives and were devised back in the days of Exchange 4.0 and were intended to be used for local storage only.

    Although it is possible to store PST files on a network drive or a UNC path this is not a supported configuration.


    “A .pst file is a file-access-driven method of message storage. File-access-driven means that the computer uses special file access commands that the operating system provides to read and write data to the file.

    This is not efficient on WAN or LAN links because WAN/LAN links use network-access-driven methods, commands the operating system provides to send data to or receive from another networked computer. If there is a remote .pst (over a network link), Microsoft Outlook tries to use the file commands to read from the file or write to the file, but the operating system then has to send those commands over the network because the file is not on the local computer. This creates a great deal of overhead and increases the time it takes to read and write to the file. Additionally, the use a .pst file over a network connection may result in a corrupted .pst file if the connection degrades or fails.”

    • Mark Wilson 11:45 am on February 3, 2010 Permalink | Reply

      Not supported – and not a good idea. But many organisations do it anyway. It’s crazy – give people bigger mailboxes and avoid PST prolifation on file servers!


    • P J Bryant 12:38 pm on February 3, 2010 Permalink | Reply

      Yup – there’s no end of organisations that have done this and don’t beleive it. I keep PST’s on the local machine for archive purposes, but copy to the server for backup. Bet i’m in a very small minority. A little paranoia is not bad.

      Exchange 2010’s cheaper archive store (fully searchable) is an attractive alternative now. And when Exclaimer get the store compression working in 64bit mode :-)


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