Article ID: 839226 - View products that this article applies to.
After you apply Microsoft Windows XP Service Pack 2 (SP2) on your computer, you may notice that the following symptoms occur in Microsoft Outlook:
This issue occurs because Outlook uses the user datagram protocol (UDP) to receive new e-mail message notifications, to update folder views, and to perform searches. By default, when you apply Windows XP SP2, it turns on the Windows Firewall. The Windows Firewall blocks the UDP packets that Outlook uses for new e-mail message notifications and for the Find feature.
Because UDP is a connectionless protocol and the Outlook client does not initiate the communication with the server, the Windows Firewall interprets the UDP packets as unsolicited and blocks them.
To work around this issue, you must make some configuration changes to the Windows Firewall for Microsoft Office Outlook 2007, Microsoft Office Outlook 2003, for Microsoft Outlook 2002, and for Microsoft Outlook 2000 to add the Outlook.exe program to Exceptions list.
For Outlook 2002 and 2000, you must also create a registry key to override the registry key set that is maintained by Windows XP SP2.
For all versions of OutlookFollow these steps to add the Outlook.exe program to the Exceptions list of your Windows Firewall:
Registry information for Outlook 2002To turn on RPC Polling in Outlook 2002, Microsoft Office XP Service Pack 1 is required.
Note If Microsoft Office 2000 Service Pack 3 is not applied, Outlook 2000 will ignore the ForcePolling registry key.
You must manually create the following keys to override the ForcePolling registry value that is set by Windows XP SP2. To do this, follow these steps.
Important This section, method, or task contains steps that tell you how to modify the registry. However, serious problems might occur if you modify the registry incorrectly. Therefore, make sure that you follow these steps carefully. For added protection, back up the registry before you modify it. Then, you can restore the registry if a problem occurs. For more information about how to back up and restore the registry, click the following article number to view the article in the Microsoft Knowledge Base:
(https://support.microsoft.com/kb/322756/ )How to back up and restore the registry in Windows
Registry information for Outlook 2000To turn on RPC polling in Outlook 2000, Microsoft Office 2000 Service Pack 3 is required. After the update is applied to the system, you must change the registry. To do this, follow these steps:
You cannot open a specific external port number on the Windows Firewall to work around this issue in Outlook 2000 and in Outlook 2002, because both of those versions of Outlook assignthe UDP port number dynamically between 1024 and 65535.
Outlook 2007 and Outlook 2003 include a registry key that allows the setting of a static UDP port for new mail notification packets. This registry key is available only in Outlook 2003 or in later versions of Outlook. You can modify the following registry key to specify a UDP port number:
HKEY_CURRENT_USER\Software\Microsoft\Office\12.0\Outlook\RPC Key: FixedUDPPort
HKEY_CURRENT_USER\Software\Microsoft\Office\11.0\Outlook\RPC Key: FixedUDPPort
The decimal value of the port number must be between 1024 and 65535.
For more information, click the following article number to view the article in the Microsoft Knowledge Base:
264035When you use the Find feature in Outlook 2003 or in Outlook 2007, you do not experience the symptoms that are described in the "Symptoms" section. Outlook 2003 and Outlook 2007 do not use the UDP to perform searches.
(https://support.microsoft.com/kb/264035/ )No way to configure port for UDP new mail notification packets
For more information about the ICF, click the following article number to view the article in the Microsoft Knowledge Base:
(https://support.microsoft.com/kb/320855/ )Description of the Windows XP Internet Connection Firewall
Article ID: 839226 - Last Review: March 25, 2008 - Revision: 14.2