Outlook Tip : Compacting PST Files regularly

April 25

When you delete or move messages around in PST files, the PST files can get fragmented.  Outlook does compact the PST files slowly in the background but you should compact at least once a month depending on how many messages you delete.  This will recover disk space back quicker as well.

To do this manually, right-click on the PST file you want to compact.  The properties dialog appears.

Click on the advanced button and the following dialog appears.

PST Advanced Properties

Click on the Compact Now button and the progress window appears.

PST Progress Window

Depending on how large the PST file and the number of messages you have deleted, it will take a while.  Once finished, click the Okay button twice to dismiss the dialogs.



Posted by on April 25, 2011 in Office, Outlook


3 responses to “Outlook Tip : Compacting PST Files regularly

  1. Cases

    April 25, 2011 at 11:54 pm

    I heard one opinion, I heard another one but finally I found something that feels right and true.

  2. Jane Parker

    May 25, 2011 at 9:06 pm

    Thanks for sharing this post. Clearly explains that how to compact PST file in very simple steps.

    There are also some nice third-party utilities to compact pst file in more efficient manner. One such great utility which makes you free from doing manual compaction and is equipped with various features to suit your needs is Compact pst tool. The tool get installed as an addon to MS Outlook and itself handle rest of the compacting process in background. Now you don’t need to be worry about heavy attachments and increasing PST file size.
    Although paid but frees you from continuously monitoring the PST size and any other manual compaction activity.

    Evaluate here:



  3. chewing gum

    July 28, 2011 at 7:25 pm

    Like it … very well pointed!