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How to Increase file size of PST to Maximum ?
Generally, there is no any announcement but default size for pst files is 50 GB. Microsoft Registry or Group Policy allows you to increase it by changing some values.
Microsoft Outlook 2003 and Outlook 2007 has maximum size of a Unicode pst-file has been limited to 20GB. Microsoft Outlook 2010, 2013 and 2016, this limit has been set to 50GB.
There is two option available, we can increase it by registry and by Group Policy.
First we will see the steps with registry,
(A) Increase via Registry:
Open Registry -> start ->
Outlook 2003
HKEY_CURRENT_USER\Software\Microsoft\Office\11.0\Outlook\PST
Outlook 2007
HKEY_CURRENT_USER\Software\Microsoft\Office\12.0\Outlook\PST
Outlook 2010
HKEY_CURRENT_USER\Software\Microsoft\Office\14.0\Outlook\PST
Outlook 2013
HKEY_CURRENT_USER\Software\Microsoft\Office\15.0\Outlook\PST
Outlook 2016
HKEY_CURRENT_USER\Software\Microsoft\Office\16.0\Outlook\PST
Here 2 DWORD values needs to create:
WarnLargeFileSize
Please make sure to not set higher than 4090445042 (Decimal) or f3cf3cf2 (hexadecimal) – This is Warning Size of 95GB
MaxLargeFileSize
Please make sure to not set higher than 4294967295 (Decimal) or ffffffff (hexadecimal) – This is Maximum Size of 100GB
Below is the screenshot to help you understand, how to set registry:
(B) Increase via Group Policies
If you would like to increase the
Expand “User Configuration\Administrative Templates\Microsoft Office Outlook 2007\Miscellaneous\PST Settings”
Large PST: Absolute maximum size
Don’t set this higher than 4294967295
Large PST: Size to disable adding new content
Don’t set this higher than 4090445042
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