Step 1: Click  Start, Control Panel, Administrative Tools, and then select Internet Information Services (IIS) Manager.

Step 2: In the left Connections menu, select the server name (host) where you want to generate the request.

Step 3: In the center menu, click the Server Certificates icon under the Security section near the bottom.

MS IIS7 Step3

Step 4: In the right Actions menu, click Create Certificate Request.

MS IIS7 Step4

Step 5: In the  Distinguished Name Properties window, enter in the required CSR details  and then click Next.

MS IIS7 Step5

Step 6: In the  Cryptographic Service Provider Properties window, select Microsoft RSA SChannel Cryptographic Provider and Bit Length of 2048, then click Next. 

MS IIS7 Step6

Step 7: Click  Browse to specify the location where you want to save the CSR as a “.txt” file and click Finish.

MS IIS7 Step7