How to Increase Outlook OST/PST File Size Limit to 100GB


📧 How to Increase Outlook OST/PST File Size Limit to 100GB


Microsoft Outlook, by default, limits the size of Offline Storage Table (OST) and Personal Storage Table (PST) files to 50GB However, for users with extensive email archives, this limit may be restrictive Fortunately, you can extend this limit to 100GB by modifying specific registry entries

⚙️ Prerequisites

  • Outlook Version:2010, 2013, 2016, 2019, or Microsoft 365

  • Operating System:Windows 10 or later

  • Permissions:Administrator access to modify the Windows Registry

  • Backup:Always back up your registry before making changes

🛠️ Steps to Modify the Registry

1. Open the Windows Registry Editor

Press Win + R, type regedit, and press Ente.

2. Navigate to the Outlook Registry Key

Depending on your Outlook version, navigate to the following pat:

  • Outlook 2010 HKEY_CURRENT_USER\Software\Microsoft\Office\14.0\Outlook\PS

  • Outlook 2013 HKEY_CURRENT_USER\Software\Microsoft\Office\15.0\Outlook\PS

  • Outlook 2016/2019/Microsoft 365 HKEY_CURRENT_USER\Software\Microsoft\Office\16.0\Outlook\PS

3. Modify or Create the Required DWORD Values

  • MaxLargeFileSize Set this value to dword:000186a0 (100,000 in decimal.

  • WarnLargeFileSize Set this value to dword:00017318 (95,000 in decimal. These settings increase the maximum file size to 100GB and set a warning at 95G.

4. Restart Outlook

Close and reopen Outlook for the changes to take effec.

⚠️ Important Considerations

  • Performance Increasing the file size limit may impact Outlook's performance, especially on systems with limited resource.

  • Corruption Risk Larger files are more susceptible to corruption. Ensure regular backups are in plac.

  • Microsoft Recommendations Microsoft advises against exceeding a 50GB OST/PST file size. Consider using Online Archive or selective sync for large mailboxe.

🧰 Alternative Solutions

If modifying the registry is not feasible or if you're seeking additional options:

  • *Split PST Files: Use tools like BitRecover PST Split to divide large PST files into smaller, manageable pars.

  • *Online Archive: Utilize Outlook's Online Archive feature to offload older emails from your primary mailbx.

📌 Additional Resources

Feel free to copy and paste this content into your Blogger.com post. If you need further customization or additional information, don't hesitate to ask!

Comments

Post a Comment