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I found that KB and see some people are saying to use this one as well:<br />
<a href="http://support.microsoft.com/kb/258277/" rel="ugc nofollow">http://support.microsoft.com/kb/258277/</a><br />
<br />
Are you familiar with this one? Will I need to use both? 
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I found that KB and see some people are saying to use this one as well:
http://support.microsoft.com/kb/258277/ [http://support.microsoft.com/kb/258277/]

Are you familiar with this one? Will I need to use both?

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I believe it depends on which version of Outlook you're using. &nbsp;The link I posted was specifically for Outlook 2003 while your link was for older versions.
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I believe it depends on which version of Outlook you're using.  The link I posted was specifically for Outlook 2003 while your link was for older versions.

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I am trying to determine the best way of blocking PST files from Outlook with a GPO. We are using Exchange 2003 and Outlook 2003 clients.<br />
<br />
When I add the Outlook 2007 template, I see two options I need; Prevent users from adding PST's to Outlook profiles and Prevent users from adding new content to PST's. <br />
<br />
These options are not available in the 2003 Admin template. I need to block the addition or creation of new PST files as well as block them from being added to Outlook. I would also like to block the ability to add new content to existing PST files.<br />
<br />
We are implementing a new mail archiving system that will pull all PST files into the system. The ultimate goal would be to block all access to PST files altogether. 
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I am trying to determine the best way of blocking PST files from Outlook with a GPO. We are using Exchange 2003 and Outlook 2003 clients.

When I add the Outlook 2007 template, I see two options I need; Prevent users from adding PST's to Outlook profiles and Prevent users from adding new content to PST's. 

These options are not available in the 2003 Admin template. I need to block the addition or creation of new PST files as well as block them from being added to Outlook. I would also like to block the ability to add new content to existing PST files.

We are implementing a new mail archiving system that will pull all PST files into the system. The ultimate goal would be to block all access to PST files altogether. 

Block PST creation/addition with GPO/Admin Templates

Exchange is the server side of a collaborative application product that is part of the Microsoft Server infrastructure. Exchange's major features include email, calendaring, contacts and tasks, support for mobile and web-based access to information, and support for data storage.

Exchange

Active Directory (AD) is a Microsoft brand for identity-related capabilities. In the on-premises world, Windows Server AD provides a set of identity capabilities and services, and is hugely popular (88% of Fortune 1000 and 95% of enterprises use AD). This topic includes all things Active Directory including DNS, Group Policy, DFS, troubleshooting, ADFS, and all other topics under the Microsoft AD and identity umbrella.

Active Directory

Windows Server 2003 was based on Windows XP and was released in four editions: Web, Standard, Enterprise and Datacenter. It also had derivative versions for clusters, storage and Microsoft’s Small Business Server. Important upgrades included integrating Internet Information Services (IIS), improvements to Active Directory (AD) and Group Policy (GP), and the migration to Automated System Recovery (ASR).