Note: You must have Outlook installed to use this guide.

Since Outlook 2003, a new PST file format is introduced that has many more advantages than the old one. The new format is also called Unicode format commonly, while the old format is then called ANSI format accordingly. Both names will be used throughout this guide.

Although the new format is much more better than the old one, sometimes (mostly for compatibility reasons) you still need to convert the PST file in the new Unicode format into the old ANSI format. For example, you want to transfer the PST data from a computer with Outlook 2003-2010 to one with only Outlook 97-2002 installed.

Microsoft hasn’t developed a utility that can perform such a conversion. But don’t worry. DataNumen Outlook Repair can help you in this matter.

Start DataNumen Outlook Repair.

Note: Before converting a new Unicode PST file with DataNumen Outlook Repair, please close Microsoft Outlook and any other applications that may modify the PST file.

Select the new Unicode PST file as the source PST file to be repaired:

You can input the PST file name directly or click the Browse and Select File button to browse and select the file. You may also click the Find button to find the PST file to be processed on the local computer.

As the PST file is in the new Outlook 2003-2010 format, please specify its file format to “Outlook 2003-2010” in the combo box beside the source file edit box. If you leave the format as “Auto Determined”, then DataNumen Outlook Repair will scan the source PST file to determine its format automatically. However, this will take additional time and is unnecessary.

By default, DataNumen Outlook Repair will save the converted data into a new PST file called xxxx_fixed.pst, where xxxx is the name of the source PST file. For example, for source PST file Outlook.pst, the default converted file will be Outlook_fixed.pst. If you want to use another name, then please select or set it accordingly:

You can input the converted file name directly or click the Browse button to browse and select the converted file name.

As we want to convert the Unicode PST file into ANSI format, we must select the format of the converted PST file to “Outlook 97-2002” in the combo box beside the converted file edit box. If you set the format to “Outlook 2003-2010” or “Auto Determined”, then DataNumen Outlook Repair may fail to process and convert your Unicode PST file.

Click the Start Repair button, and DataNumen Outlook Repair will start scanning and converting the source Unicode PST file. Progress bar

DataNumen Access Repair Progress Bar

will indicate the conversion progress.

After the process, if the source Unicode PST file can be converted into the new ANSI PST file successfully, you will see a message box like this:

Now the new converted PST file is in the ANSI format, which can be opened by Microsoft Outlook 97-2002.

Note: The demo version will display the following message box to show the success of the conversion:

In the new converted PST file, the contents of the messages and attachments will be replaced with a demo information. Please order the full version to get the actual converted contents.