How to Deploy Microsoft Exchange Server 2010 in a Two-Armed Configuration

Follow the steps in this article to deploy the Microsoft^® Exchange Server 2010 in a two-armed configuration.

On the Barracuda Load Balancer ADC, create services for the Exchange services.

1. Log into the Barracuda Load Balancer ADC, and go to the BASIC > Services page. 

2. Add all of the services listed in Table 1. For each service, add all the real servers in the CAS array. To add a service, click Add Service and enter the values in the corresponding fields. To add a real server, click Add Server and enter the IP address and port for the server.
   Table 1. Required Services

3. If you have the Barracuda Load Balancer ADC 640 and above, you can enable Application Security for OWA-HTTPS.

   1. For Application Security, select Enable.

   2. For Security Mode, select the Passive mode. It is recommended that you run the service in Passive mode before going active. 

   3. From the Security Policy list, select owa2010. This policy is predefined for all Exchange applications. If you want to edit the policy settings, go to the SECURITY > Security Policies page

   4. You need to modify the default owa2010 policy. Go to the SECURITY > Security Policies page and select the owa2010 security policy. In the Cookie Security section, set Tamper Proof Mode to None.

4. For OWA-HTTPS only, enable health checks for its real servers. 

   1. Next to the entry of the real server, click Edit.

   2. Scroll to the Server Monitor section, and enter the values in the corresponding fields.

   3. Click Save.

5. If SNI is enforced on the Microsoft Exchange server(s), you need to configure the following options. Go to the BASIC > Services page and click Edit for each affected server.

   1. Change the port on the server to 443.

   2. Navigate to the SSL section and set Server uses SSL to On.

   3. Expand Settings and set Enable SNI to Yes.

6. If you deployed the Hub Transport Role on servers other than those in the CAS array, add the following services in Table 2.
   Table 2. (If applicable) SMTP Services

7. Update the TCP timeout values on the Barracuda Load Balancer ADC.

   1. Go to the ADVANCED > System Configuration page.

   2. Set the TCP Connections Timeout and TCP Closed Connections Timeout to 1200 seconds.

To simplify access to the Outlook Web Access site for your users, configure a rewrite rule to add /OWA to the end of the URL.

1. Go to the TRAFFIC > Web Translations page.

2. From the Service list, select the OWA-HTTPS service.
   

3. In the HTTP Request Rewrite section, add the following rule. Click Add Rule and enter the values in the corresponding fields.

4. Click Save.

Your installation is complete. You can now test your setup and configure access control to your applications. For instructions, see:

• How to Test the Microsoft Exchange Server 2010 Deployment Configuration

• Access Control