Find Step by Step Solution to Compact OST File in Outlook

  Admin |   17-Mar-16

Using Microsoft Outlook in regular basis can increase the size of your Outlook data files (.pst or .ost). But an extra large PST file would have a negative effect on MS Outlook performance. So to avoid this issue, you can simply compact an Outlook PST file as well OST files.

The compacting OST file actually enables you to use the additional space that is usually available in the Exchange OST file. In this article we will discuss how to reduce size of OST file in Outlook by deleting white spaces.

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What is White Space and Auto Compact?

You should ensure that any deletion (soft or hard) operation never deletes emails, contacts and other items from your mailbox completely. Such deletion operation just makes your data invisible, thus  you are just not able to view/read those items in your mailbox. Generally, when you permanently delete an item, it will turn into this “white space”. To stop this from happening, the file contains “white space”; Space which can be used by new & modified items.

Solution to Compact an Offline Folder (.ost) in MS Outlook

Microsoft Outlook has inbuilt option “Compact Now ” by using which you can reduce the size of Outlook data files. But when you are using an Exchange account, you require some additional clicks to get to the Compact Now button as shown below:

How to Compact OST File in Outlook 2003 and Outlook 2007?

    1. Open the Tools menu >> Choose Account Settingsaccount-setting-outlook-2010-2013


    1. Double-click on Microsoft Exchange >> Click on More Settingssettings


    1. Select the Advanced tab >> Offline Folder File Settings…Advance settings


    1. Finally Click on Compact Nowcompact ost file in outlook 2013


How to Compact OST File in Outlook 2016, 2013 and Outlook 2010?

    1. Open the Filetab >> click on Info >>  choose Account Settings.compact outlook 2007 ost file


    1. Press double-click on Microsoft Exchange >> and click on More Settingssettings


    1. Select the Advanced tab >> Outlook Data File Settings…Advance settings


    1. At the last, Click on Compact Nowcompact ost file in outlook 2013


Conclusion:  The article is discussed about how to compact OST file in Outlook. You can get simple steps to compact and reduce size of OST file for respective Outlook edition. We hope you will get this helpful to solve the related query. You can also make sure how to create a new OST file in Outlook by reading another post on the blog.

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