To generate a Certificate Signing Request (CSR), please do the following:
Using the Internet Services Manager, right click on the website that is hosting your OWA component (this is by default the ‘Default Web Site’) and open its properties.
Select the Directory Security tab and then click on Server Certificates. The Web Server certificates Wizard will now be displayed. Click Next.
On the Server Certificate dialogue box, select Create a new certificate and click Next.
In the Delayed or Immediate Request dialogue box select Prepare the request now, but send it later and click Next.
Give your new certificate a name and also select the level of security you would like to use (2048 is recommended) and click Next.
In the Organisation Information dialogue box, enter the name of your organization. This should be as you want it to appear on any legal documents as this is the name that will appear in your certificate. The organization unit can be a location, department or business unit within your company.
In the Common Name, you must enter the Fully Qualified Domain Name of your web server.
You are now presented with the Geographical Information dialogue box. It is important to make sure you enter the State in full, for example "London" not just "LN". Abbreviating State names will be rejected.
The last step is to specify the location of the Certificate Request File, remember where and what you called this as you will need it later.
The Request File Summary will now appear. Make sure everything is OK and then click Next to process the request.
You have now successfully created a Certificate Signing Request (CSR), which you will need to request your SSL Certificate.