2. In the Internet Information Services console, right-click on the entry for Default Web Site, and select Properties.
3. Click the Directory Security Tab in the Default Web Site Properties screen.
4. Click the Server Certificate button under Secure Communications.
5. The IIS Server Certificate Wizard is displayed. Click Next.
6. Select Create a new certificate, and click on Next.
7. Select Prepare the request now, but send it later. Click on Next.
8. In Name, type the name for the server certificate.
9. In Bit length, enter the bit length to be used for the certificates's encryption strength, the greater the bit length, and the higher the security. It is recommended that you select 1024 or higher here. Click Next.
10. Enter details about your organization. Click Next.
11. Enter the FQDN of the Secure Gateway, and click Next.
12. In Geographical Information, enter pertinent geographical information about your location. Click on Next.
13. Save the certificate request as a text file, for example, c:\certreq.txt, to your hard drive. Click Finish to exit the wizard.
These instructions are from the following Citrix Knowledgebase Solution.