Folders update slowly when an Exchange user uses Outlook in online mode

When you access a Microsoft Exchange Server 2010 mailbox by using Microsoft Office Outlook 2003 in online mode, you may encounter the following issues:

• Outgoing email messages stay in the Outbox folder for up to 1 minute.
• New email messages do not arrive in the Inbox folder immediately and are delayed for up to 1 minute.
• Items that are deleted from folders still appear in the folder for up to 1 minute.
• Items that are moved from one folder to another folder still appear in the original folder for up to 1 minute.

The folder updates do not occur in a timely manner.

To resolve this issue, install Update Rollup 3 for Exchange Server 2010 Service Pack 1 (SP1).

For more information about Update Rollup 3 for Exchange Server 2010 SP1, click the following article number to view the article in the Microsoft Knowledge Base:
After you install this update, you have to create a registry subkey to enable the UDP notifications support feature. To have us enable the UDP notifications support feature for you, go to the "Fix it for me" section. If you prefer to enable the UDP notifications support feature yourself, go to the "Let me fix it myself" section.

Fix it for me

To fix this problem automatically, click the Fix this problem link. Then click Run in the File Download dialog box, and follow the steps in this wizard.


Notes

• This wizard may be in English only, but the automatic fix also works for other language versions of Windows.
• If you are not on the computer that has the problem, you can save the automatic fix to a flash drive or to a CD so that you can run it on the computer that has the problem.

Let me fix it myself

Note This section is intended for advanced computer users. For help with advanced troubleshooting, ask your system administrator or contact Microsoft Support.

Warning Serious problems might occur if you modify the registry incorrectly by using Registry Editor or by using another method. These problems might require that you reinstall the operating system. Microsoft cannot guarantee that these problems can be solved. Modify the registry at your own risk.

To enable the UDP notifications support feature, create the EnablePushNotifications registry subkey. To do this, follow these steps:

1. Click Start, click Run, type regedit, and then click OK.
2. Locate and then select the following registry subkey:
   HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\MSExchangeRPC
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3. On the Edit menu, point to New, and then click Key.
   
   
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4. Type ParametersSystem, and then press Enter.
5. Locate and then select the following registry subkey:
   HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\MSExchangeRPC\ParametersSystem
6. On the Edit menu, point to New, and then click DWORD Value.
   
   
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7. Type EnablePushNotifications, and then press Enter.
   
   Note The default value is 0, which disables the UDP notification support feature.
8. In the details pane, right-click EnablePushNotifications, and then click Modify.
   
   
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9. In the Value data box, type 1, and then click OK.
   
   
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10. On the File menu, click Exit to close Registry Editor.
    
    
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To work around this issue, use the cached exchange mode in Outlook 2003. To do this, follow these steps:

1. Exit Outlook 2003.
2. Click Start, and then click Control Panel.
3. Click User Accounts and Family Safety.
   
   
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4. Click Mail.
   
   
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5. Click E-mail Accounts.
   
   
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6. Select View or change existing e-mail accounts, and then click Next.
7. Select an Exchange account, and then click Change.
   
   
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8. Select the Use Cached Exchange Mode check box.
   
   
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9. Click Next, and then click Finish.
10. Start Outlook 2003.

Note This section is intended for advanced computer users. For help with advanced troubleshooting, ask your system administrator or contact Microsoft Support.

To determine whether push notifications work, follow these steps.

Warning Serious problems might occur if you modify the registry incorrectly by using Registry Editor or by using another method. These problems might require that you reinstall the operating system. Microsoft cannot guarantee that these problems can be solved. Modify the registry at your own risk.

1. To enable push notifications, create the EnablePushNotifications registry subkey on the Client Access Server. To do this, follow these steps:
   1. Click Start, click Run, type regedit, and then click OK.
   2. Locate and then select the following registry subkey:
      HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\MSExchangeRPC
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   3. On the Edit menu, point to New, and then click Key.
      
      
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   4. Type ParametersSystem, and then press Enter.
   5. Locate and then select the following registry subkey:
      HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\MSExchangeRPC\ParametersSystem
   6. On the Edit menu, point to New, and then click DWORD Value.
      
      
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   7. Type EnablePushNotifications, and then press Enter.
      
      Note The default value is 0, which disables the UDP notification support feature.
   8. In the details pane, right-click EnablePushNotifications, and then click Modify.
      
      
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   9. In the Value data box, type 1, and then click OK.
      
      
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2. Create the FixedUDPPort registry subkey on the client computer to configure Outlook 2003 to use a fixed UDP port. To do this, follow these steps:
   1. In Registry Editor, locate and then select the following registry subkey:
      HKEY_CURRENT_USER\Software\Microsoft\Office\11.0\Outlook
   2. On the Edit menu, point to New, and then click Key.
      
      
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   3. Type RPC, and then press ENTER.
   4. Locate, and then click to select the following registry subkey:
      HKEY_CURRENT_USER\Software\Microsoft\Office\11.0\Outlook\RPC
   5. On the Edit menu, point to New, and then click DWORD Value.
      
      
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   6. Type FixedUDPPort, and then press Enter.
   7. In the details pane, right-click FixedUDPPort, and then click Modify.
      
      
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   8. In the Value data box, type a value for the port between 1024 and 65535, and then click OK.
      
      
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   9. On the File menu, click Exit to close Registry Editor.
3. Configure Windows Firewall to allow for UDP traffic through the port that you specified in step 2H on the client computer. For more information about how to do this, go to the following Microsoft website:
   Open a port in Windows Firewall

   (http://windows.microsoft.com/en-CA/windows-vista/Open-a-port-in-Windows-Firewall)
4. Open Outlook 2003, and create a new Exchange user.
   
   Note Push notifications are supported only in Outlook 2003. Outlook 2007 or a later version will not receive push notifications.
5. Send a new email message to the Exchange user.
6. Outlook 2003 displays the new email message within 1 minute.
   
   Note If Outlook 2003 does not register push notifications, it uses polling that occurs every 1 minute. With push notifications, Outlook 2003 receives notifications more quickly.

Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.