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Permanently remove all deleted content from PST and OST files

By default, a small percentage of deleted data is not overwritten in Outlook PST and OST files. By enabling this setting, all deleted data in PST and OST files is overwritten when users exit Outlook.

Policy Details

Policy Name
L_Permanentlyremovealldeleteditems
Registry Key
software\policies\microsoft\office\16.0\outlook\pst
Value Name
pstnullfreeonclose
Supported On
At least Windows Server 2008 R2 or Windows 7
Policy State Values
Enabled: 1
Disabled: 0
Available Languages
en-us