Outlook 2007 Exchange server is inaccessible outside network

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I am having problems with my Exchange server for Outlook 2007.

This is because no matter how I try, I can’t access the Exchange server for Outlook 2007 while outside the network.

I however can access the Exchange server for Outlook 2007 from within the network with no problem.

I use Exchange 2010 and Client access outlook 2007.

I think there is a need to change some setting since I can access OWA from outlook.

Please assist me.

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Answered By 0 points N/A #107120

Outlook 2007 Exchange server is inaccessible outside network

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This problem may occur if the Outlook 2007 client computer does not have a default gateway configured.

If you cannot configure a default gateway for your network settings, you can work around this problem by adding a DWORD value that is named DefConnectOpts to the following registry subkey:

HKEY_CURRENT_USERSoftwareMicrosoftOffice12.0OutlookRPC

Let me fix it myself

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:

322756  How to back up and restore the registry in Windows

To add this DWORD value yourself, follow these steps.

 

Outlook 2007

 

Click Start, click Run, type regedit in the Open box, and then click OK.

Locate and then click the following subkey:

HKEY_CURRENT_USERSoftwareMicrosoftOffice12.0OutlookRPC

 

On the Edit menu, point to New, and then click DWORD Value.

Type DefConnectOpts, and then press ENTER.

Right-click DefConnectOpts, and then click Modify.

In the Value data box, type 0, and then click OK.

Exit Registry Editor.

 

Outlook 2010

 

Click Start, click Run, type regedit in the Open box, and then click OK.

Locate and then click the following subkey:

HKEY_CURRENT_USERSoftwareMicrosoftOffice14.0OutlookRPC

 

On the Edit menu, point to New, and then click DWORD Value.

Type DefConnectOpts, and then press ENTER.

Right-click DefConnectOpts, and then click Modify.

In the Value data box, type 0, and then click OK.

Exit Registry Editor.

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