Note: You must have Outlook 2003 or higher versions installed to use this guide.

Since Outlook 2003, a new PST file format is introduced that has many more advantages than the old one. For end users, the most important ones are:

Due to the first 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. As nowadays the communication data increase so rapidly, the removal of the limitations on the PST file is very vital to the users. Therefore, we highly suggest you to convert your old ANSI PST files into the new Unicode format. Moreover, this is also the best solution for the oversized 2GB PST file problem.

Microsoft hasn’t produced a tool that can make the conversion. But don’t worry. DataNumen Outlook Repair can do this for you.

Start DataNumen Outlook Repair.

Note: Before converting an old ANSI PST file with DataNumen Outlook Repair, please close Microsoft Outlook and any other applications that may modify the PST file.

Select the old ANSI PST file as the source PST file to be repaired:

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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 old Outlook 97-2002 format, please specify its file format to “Outlook 97-2002” in the combo box blank 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:

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

Please note you must have Outlook 2003 or higher versions installed to make the file converted successfully.

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

DataNumen Access Repair Progress Bar

will indicate the conversion progress.

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

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Now the new converted PST file is in the Unicode format, which can be opened by Microsoft Outlook 2003 or higher versions.

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

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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.