To install your SSL certificate, you will need to do the following:
1
Open Internet Information Services Manager, or the custom MMC containing the Internet Information Services snap-in.
2
Expand Internet Information Services (if needed) and browse to the Web site you have a pending certificate request on.
3
Right-click on the site and then click Properties.
4
Click the Directory Security tab.
5
Under the Secure Communications section, click Server Certificate.
6
On the Web Server Certificate Wizard, click Next.
7
Choose to Process the Pending Request and Install the Certificate. Click Next.
8
Type in the location of the certificate response file (you may also browse to the file), and then click Next.
9
Read the summary screen to be sure that you are processing the correct certificate, and then click Next.
10
You will see a confirmation screen. After reading this information, click Next.
You now have a secure server certificate installed. Now you must assign it in Exchange:
1
Using the Internet Services Manager, open the properties for the Exchange virtual directory.
2
Select the Directory Security tab and the click on the Edit button in the Secure Communication section.
3
In the Secure Communications dialogue box, check the box Require Secure Channel (SSL), you could also check the box Require 128-bit encryption, if you do check the 128-bit checkbox, any browsers that do not support 128-bit encryption will be unable to connect to OWA.
Now when users enter http://www.yourdomain.com/exchange, they will receive an "HTTP 403.4 - Forbidden: SSL required Internet Information Services" error message, because we have configured OWA to require SSL. SSL uses the HTTPS protocol, so users would need to enter the url as:
https://www.yourdomain.com/exchange.