Disable or Enable PST use in Microsoft Outlook
You may want to control whether users can create a new .pst or adding a .pst file to Outlook.
Prevent users from adding new .pst files.
To prevent users from connecting a .pst file to Outlook, add the DisablePST registry entry, and then set the value to 1. To do this, follow these steps:
- Open Registry Editor.
2.Locate and select the following registry subkey. You have to create the key if it does not exist.
You have to create the key if it does not exist.
| Type | Registry path |
|---|---|
| Group Policy | HKEY_CURRENT_USER\Software\Policies\Microsoft\Office\xx.0\Outlook |
| Office Customization Tool (OCT) | HKEY_CURRENT_USER\Software\Microsoft\Office\xx.0\Outlook |
Note:The xx.0 placeholder represents the Outlook version (16.0 = Outlook 2016 and Outlook for Office 365, 15.0 = Outlook 2013, 14.0 = Outlook 2010, 12.0 = Outlook 2007).
3. On the Edit menu, point to New, and then select DWORD Value.
4. Type DisablePST, and then press Enter.
5. Right-click the DisablePST registry entry that you created, and then select Modify.
6. In the Value data box, type 1, and then select OK.
The DisablePST registry entry can be set to the following values.
| Value | Description |
|---|---|
| 0 | Users can add .pst files. This is the default value. |
| 1 | Users cannot add .pst files. However, in scenarios in which a .pst file was connected to Outlook before this registry value was added, the existing .pst file will still be connected. No new.pst files can be added. |
| 2 | Users can add only exclusive sharing .pst files, such as SharePoint .pst files. |
