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Barracuda SSL VPN

How can I configure Outlook RPC over HTTPS in Outlook 2003 to connect to Exchange via my Barracuda SSL VPN?

  • Type: Knowledgebase
  • Date changed: 3 years ago
Solution #00003852

All Barracuda SSL VPNs, all firmware versions; Outlook 2003 SP1 email client.

Utilizing Outlook RPC over HTTPS can be useful for users who use, for instance, laptops and connect from a variety of locations as it eliminates the need for using a VPN to connect directly to a private network where the email server is hosted.

If you have not yet done so, you will first need to configure your Barracuda SSL VPN as an Exchange RPC proxy. Instructions for doing so can be found in Solution #00003725.

To configure Outlook RPC over HTTPS, perform the following steps. This how-to assumes that you have not yet set up the email client to use the Exchange server:
  1. Start Outlook, select the Tools menu item, and then select E-mail Accounts.
  2. Select View or Change Existing E-mail Accounts, and click Next.
  3. Click Add and select Microsoft Exchange Server
  4. Enter the hostname or IP address of your Microsoft Exchange server.
  5. Leave the Cached Exchange Mode box checked if you would like to cache emails locally on your machine and ensure offline access.
  6. Enter your username in the User Name field.
  7. Click More Settings and then click the Connection tab.
  8. Check the box Connect to my Exchange mailbox using HTTP.
  9. Click the Exchange Proxy Settings button.
  10. In the field Use this URL to connect to my proxy server for Exchange enter the URL, which can be resolved from external networks, that points to your Barracuda SSL VPN. 
  11. Click OK successively until you return to the main window of the wizard. Click Next and then click Finish
Additional Notes:
For further information on configuring Outlook 2003 for RPC over HTTPS, please refer to the following links:

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