Is it possible to set the default PST file location in Outlook (Office 365) to the D drive?

Note: Modifying registry subkeys or work group is intended for advanced users, and IT administrators. It can help fix some problems; however, serious problems might occur if you modify the registry incorrectly. Therefore, make sure that you follow these steps carefully. For further protection, back up the registry before you modify it.

Hi @Taufiq

Thank you for reaching out to Microsoft Q&A forum.

After doing some research, yes, it is possible to change the default location for new PST files in Outlook for Office 365 using a registry edit. Note that if your users are using Microsoft 365/Exchange accounts in cached mode, the large data files are typically OST files rather than PST those require a similar but separate registry key (ForceOSTPath) and involve removing/re-adding the account to apply the change, as OST files are recreated by Outlook.

1.First, close Outlook completely. Press Windows + R and type in regedit.

2.Navigate to HKEY_CURRENT_USER\SOFTWARE\Microsoft\Office\16.0\Outlook.

3.Right click at Outlook > New > Expandable String Value. Name ForcePSTPath or ForceOSTPath depend on your case.

4.After creating, double click at the key and fill in the value, the value will be the location you want to store your PST/OST file.

Note: Storing PST files on network shares or synced folders (e.g., OneDrive) is not supported and can cause corruption.

5.Then restart Outlook. If the changes do not apply, remove and re-add account.

Please try and let me know if it works for you.

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Yes, it is possible to change the default location for PST files in Outlook by modifying the registry settings. You can set the default PST file location to the D drive by following these steps:

1. Open the Registry Editor by selecting Start, typing regedit, and pressing Enter.
2. Navigate to the following registry path: HKEY_CURRENT_USER\Software\Microsoft\Office\16.0\Outlook\Options
3. If the Options key does not exist, you may need to create it.
4. On the Edit menu, select New > String Value.
5. Name the new value DefaultPath.
6. Double-click on DefaultPath and enter the path to your desired location on the D drive (e.g., D:\YourFolderName) in the Value data box.
7. Click OK and exit the Registry Editor.

Make sure to back up the registry before making any changes to avoid potential issues. This change will redirect the default location for saving PST files to the specified folder on the D drive.