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Outlook 2010 pst

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Folks, I have a user that gets error:  "Outlook cannot add the folder because creating a new Outlook data file (.pst) isn't allowed on this computer".   The pst file use had not been allowed into our enviromnent for ever.  this user received a brand new  built pc with win XP sp3 and MS Office 2010 and receved the error the second time he opened Outlook 2010, I recreated his Outlook profile on the pc and the same happened: the first time Outlook opened seamlessly, then closed it and on reopened the second time and ever since he gets the error.   This error pops-up on any pc he uses.  
Any suggestions/ideas?   Thank you DG
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Commented:
There is a registry key, DisablePST, that when set to 1 prevents new PST files from being
created. It seems that when  installed CommVault.  To fix this, we set DisablePST = 2.

you  hav to set DisablePST = 2 for each version of Office on the PC from 9.0
to 12.0:

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Office\9.0\Outlook
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Office\10.0\Outlook
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Office\11.0\Outlook
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Office\12.0\Outlook

Author

Commented:
Thank you PaulD77, but there isn't such a key in any of the locations listed.  Should I create one?  
As you say "This error pops-up on any pc he uses", the deny to add a pst is associated to the user.
There is certainly a GPO that deny to add pst.
Look at this :http://exchange-2010-info.blogspot.com/2010/03/how-to-use-group-policy-to-disable-pst.html
You can check HKEY_CURRENT_USER\Software\Policies\Microsoft\office\14.0\outlook and remove the key DisablePST, but if there is a GPO, when the GPO will be updated the deny will be apply again

Author

Commented:
Ok, I will go the GPO route, thanls for the support.  Regards, Dom G
Do you succeed to modify the GPO ?

Author

Commented:
thank you