Configure Outlook 2003/2007 to open pst files larger than 2gb
Posted by (Inactive) Lacinda Riesland, Last modified by (Inactive) Lacinda Riesland on 29 November 2011 02:27 PM

From: http://support.microsoft.com/kb/832925

In the following table, the MaxLargeFileSize registry entry and the WarnLargeFileSize registry entry refer to a UNICODE formatted (new Large format) file, and the MaxFileSize registry entry and the WarnFileSize registry entry refer to an ANSI formatted (an earlier Microsoft Outlook format) file. The UNICODE values are set in megabyte (MB) increments, while the ANSI values are set in byte increments.

 Collapse this tableExpand this table
Name Type Valid Data Range Default
MaxLargeFileSize REG_DWORD 0x00000001 – 0x00005000 0x00005000 20,480 (20 GB)
WarnLargeFileSize REG_DWORD 0x00000000 – 0x00005000 0x00004C00 19,456 (19 GB)
MaxFileSize REG_DWORD 0x001F4400 – 0x7C004400 0x7BB04400 2,075,149,312 (1.933 GB)
WarnFileSize REG_DWORD 0x00042400 – 0x7C004400 0x74404400 1,950,368,768 (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
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