How to configure the size limit for both .pst and .ost files in Outlook 2007 and in Outlook 2003
Microsoft Office Outlook 2007 and Microsoft Office Outlook 2003 supports both American National Standards Institute (ANSI) and UNICODE personal folders (.pst) and offline folder (.ost) files. You can use the following four registry entries to limit the size of both the .pst and the .ost files:
• The MaxFileSize registry entry
• The WarnFileSize registry entry
• The MaxLargeFileSize registry entry
• The WarnLargeFileSize registry entry
Note The WarnLargeFileSize and WarnFileSize registry entries do not enable Outlook to warn you before the file size limit is reached.
The default values for these entries are:
MaxLargeFileSize = 20 GB
WarnLargeFileSize = 19 GB
MaxFileSize = 1.933 GB
WarnFileSize = 1.816 GB
The policy location for the registry entries is located in the following path in Registry Editor.
Outlook 2007
HKEY_CURRENT_USER\Software\Policies\Microsoft\Office\12.0\Outlook\PST
The user preference location for the registry entries is located in the following path in Registry Editor:
HKEY_CURRENT_USER\Software\Microsoft\Office\12.0\Outlook\PST
Outlook 2003
HKEY_CURRENT_USER\Software\Policies\Microsoft\Office\11.0\Outlook\PST
The user preference location for the registry entries is located in the following path in Registry Editor:
HKEY_CURRENT_USER\Software\Microsoft\Office\11.0\Outlook\PST
Check out Microsoft’s KB article 832925 for more details on this topic.
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