Manage Outlook Data File Size in Window
The default data file size in Outlook for Windows depends on the version of Outlook you're using: Outlook 2010 and Later (Unicode format): The default maximum size is 50 GB Outlook 2007 and 2003 (Unicode format - if applicable): The default maximum size is 20 GB These are the default limits, but it's possible to configure a larger or smaller maximum size by editing the Windows registry. Steps to Increase Outlook Data File Size: 1) Open the Registry Editor: · Press Windows + R, type regedit, and press Enter. 2) Navigate to the Registry Path: · For Outlook 2016, 2019, and Office 365: HKEY_CURRENT_USER\Software\Microsoft\Office\16.0\Outlook\PST · For Outlook 2013: HKEY_CURRENT_USER\Software\Microsoft\Office\15.0\Outlook\PST · For Outlook 2010: HKEY_CURRENT_USER\Software\Microsoft\Office\14.0\Outlook\PST 3) Create or Modify the Registry Values: · MaxLargeFileSize : Defines the maximum size limit of the PST/OST file. ·
