Lars Nielsen's Discoveries

January 4, 2010

“Outlook cannot add the folder” error

Filed under: SharePoint,Troubleshooting — Lars Nielsen @ 6:41 pm
Tags: , , ,

Some users get an error dialog box when they try to connect a calendar or tasks lists to Outlook (using ActionsConnect to Outlook.  The error is:

Outlook cannot add the folder because creating a new Personal Folder (.pst) file isn’t allowed on this computer

There are quite a few posts on how to resolve this.  You need to edit the registry settings for Outlook.  To do this, first create a system restore point or back up your registry in some other way.  Then click Start, Run, and in the textbox type regedit.  Always be careful using regedit…  Navigate to the Office root here:

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Office

You’ll see various numbered folders for curent and previous versions of Office.  Look in the numbered folder that matches the version of Outlook you’re using now, for Office 2007 this is 12.0.  Look in the Outlook subfolder.  So for example this is the folder for Outlook 2007:

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Office\12.0\Outlook

In this folder look for the DisablePST key and if the value is 1, change it to 2.  Changing it to 2 prevents users from creating PST files manually, but allows the system to create them so that Outlook can connect properly to SharePoint.  If you change the value to 0, users will be able to create a local PST file which is something that many organisations running Exchange want to prevent.  If you have a group policy that sets DisablePST to be 1, you can change the policy to set it be 2 instead so that Outlook can work properly with SharePoint.

I also found that having set DisablePST to be 2 to allow local PST files, and connected a SharePoint calendar to Outlook, I can reset DisablePST back to 1 and I can still add new SharePoint calendars into Outlook without error.  It just takes that initial connection to set it up.

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2 Comments »

  1. Appreciate this. Very interesting article.

    Comment by Lawrence Swoffer — January 9, 2010 @ 7:10 am

  2. Is this done on the Exchange Server? or at a users computer. Also if it is Office 2010 , then the version is 14 and not 12. Is it the same procedure cause I dont see this for Office 2k10. Thanks!

    Comment by oscar — February 12, 2013 @ 3:20 pm


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