Bridge to Nova

Have you guys always tried Outlook 2007 with exchange 2003 over internet by using RPC(Now Microsoft called it Outlook Anywhere)? If so, you might face these kinds of errors:

• If your Outlook profile has been automatically configured, you may receive the following error message:
The action cannot be completed. The connection to the Microsoft Exchange Server is unavailable. Your network adapter does not have a default gateway.
• If your Outlook profile has been manually configured, you may receive the following error message:
Your Microsoft Exchange Server is unavailable
For example, this error may occur when you have an existing profile that was previously connected to the Exchange Server, and then you lose the setting for your default gateway. In this scenario, if you click Check Name to verify your settings in the E-mail Accounts dialog box, you may receive the following error message:
Outlook cannot log on. Verify that you are connected to the network and are using the proper server and mailbox name. The connection to the Microsoft Exchange Server is unavailable. Your network adapter does not have a default gateway.
When you try to connect Outlook 2007 to Microsoft Exchange Server 2003 by using RPC over HTTPS, you may receive the following error message:
Cannot start Microsoft Office Outlook. Cannot open the Outlook window. The set of folders cannot be opened. The attempt to log on to Microsoft Exchange has failed.

Well there is a simple solution for this:

You can work around this problem by adding a DWORD value to the following registry subkey:
HKEY_CURRENT_USER\Software\Microsoft\Office\12.0\Outlook\RPC
To add this DWORD value, 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. Click Start, click Run, type regedit in the Open box, and then click OK.
2. Locate and then click the following subkey:
HKEY_CURRENT_USER\Software\Microsoft\Office\12.0\Outlook\RPC
3. On the Edit menu, point to New, and then click DWORD Value.
4. Type DefConnectOpts, and then press ENTER.
5. Right-click DefConnectOpts, and then click Modify.
6. In the Value data box, type 0, and then click OK.
7. Exit Registry Editor.

Source : Microsft