Tip: Other languages are Google-Translated. You can visit the English version of this link.
Log in
x
or
x
x
Register
x

or

How to compact data (pst/ost) files in Outlook?

For a long time Microsoft Outlook’s data files (pst/ost file) may have taken up huge space in your computer. Apart from mailbox cleanup by emptying deleted items folders, you can release the occupied space by compacting data files. This article will show you how to compact data file (pst/ost data files) in Microsoft Outlook.

Office Tab - Enable Tabbed Editing and Browsing in Office, and Make Work Much Easier...
Kutools for Outlook - Brings 100 Powerful Advanced Features to Microsoft Outlook
  • Auto CC/BCC by rules when sending email; Auto Forward Multiple Emails by rules; Auto Reply without exchange server, and more automatic features...
  • BCC Warning - show message when you try to reply all if your mail address is in the BCC list; Remind When Missing Attachments, and more remind features...
  • Reply (All) With All Attachments in the mail conversation; Reply Many Emails at once; Auto Add Greeting when reply; Auto Add Date&Time into subject...
  • Attachment Tools: Auto Detach, Compress All, Rename All, Auto Save All... Quick Report, Count Selected Mails, Remove Duplicate Mails and Contacts...
  • More than 100 advanced features will solve most of your problems in Outlook 2010-2019 and 365. Full features 60-day free trial.

The following steps will guide you to compact data (pst/ost) files in Microsoft Outlook.

Step 1: Open the Account Settings dialog box:

  1. In Outlook 2007, please click the Tools > Account Settings;
  2. In Outlook 2010 and 2013, please click the File > Info > Account Settings > Account Settings.

Step 2: In the Account Settings dialog box,

  1. Click the Data Files tab;
  2. Click to highlight a data file that you will compact later;
  3. Click the Settings button.

Step 3: If you select a pst data file in Step 2, please skip to the Step 4.

If you select an Exchange account’s ost data file in Step 2, the Microsoft Exchange dialog box will come out. Please check the Use Cached Exchange Mode box and then click the Outlook Data File Settings button (or Offline Folder File Settings button in Outlook 2007) on the Advanced tab in this dialog box. But if the selected ost data file is not from the Exchange account, please skip to the Step 4.

Step 4: In the new popping up dialog box, please click the Compact Now button.

Step 5: Click all OK buttons and Close button.


Kutools for Outlook - Brings 100 Advanced Features to Outlook, and Make Work Much Easier!

  • Auto CC/BCC by rules when sending email; Auto Forward Multiple Emails by custom; Auto Reply without exchange server, and more automatic features...
  • BCC Warning - show message when you try to reply all if your mail address is in the BCC list; Remind When Missing Attachments, and more remind features...
  • Reply (All) With All Attachments in the mail conversation; Reply Many Emails in seconds; Auto Add Greeting when reply; Add Date into subject...
  • Attachment Tools: Manage All Attachments in All Mails, Auto Detach, Compress All, Rename All, Save All... Quick Report, Count Selected Mails...
  • Powerful Junk Emails by custom; Remove Duplicate Mails and Contacts... Enable you to do smarter, faster and better in Outlook.
shot kutools outlook kutools tab 1180x121
shot kutools outlook kutools plus tab 1180x121
 
Say something here...
symbols left.
You are guest ( Sign Up? )
or post as a guest, but your post won't be published automatically.
Loading comment... The comment will be refreshed after 00:00.
  • To post as a guest, your comment is unpublished.
    JamesAlison · 2 years ago
    I think MS Outlook users can try Stellar Phoenix Compact PST. It is completely free for 15 days.