Increase OST limit to 100GB, but the Office folder in Regedit is missing

Article
2018-07-11

Question

_{Wednesday, July 11, 2018 9:16 AM}

We need to increase the Outlook OST limit from 50GB to 100GB, as this user is using an O365 E3 license.

Reading from some this link https://support.microsoft.com/en-my/help/832925/how-to-configure-the-size-limit-for-both-pst-and-ost-files-in-outlook it can be modified by changing the registry value.

However when navigating the regedit, we couldn't go to this path

HKEY_CURRENT_USER\Software\Policies\Microsoft\Office\16.0\Outlook\PST

HKEY_CURRENT_USER\Software\Microsoft\Office\16.0\Outlook\PST

We can only navigate up to here: HKEY_CURRENT_USER\Software\Policies\Microsoft

What would be the next step/s?

All replies (2)

_{Thursday, July 12, 2018 3:20 AM ✅Answered}

Hi,

You could try manually creating the value and DWORD under this path to check the results.

(Important Follow the steps in this section carefully. Serious problems might occur if you modify the registry incorrectly. Before you modify it, back up the registry for restoration in case problems occur.

Please refer to this article about how to back up and restore the registry in Windows)

Besides, we could also set this via Group Policy. The settings for adjusting the maximum file size for pst-files and ost-files can be found in the section;

User Configuration-> Administrative Templates-> Microsoft Outlook <version>-> Miscellaneous-> PST Settings.

The following 2 settings need to be modified;

Large PST: Absolute maximum size

Large PST: Size to disable adding new content

Hope this is helpful to you.

Regards,

Perry

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_{Friday, July 13, 2018 2:05 AM}

Hi，

I'm writing to see if the information above is helpful to you.

Please feel free to tell me if you need further assistance.