What’s a Certificate Signing Request

• A CSR is an encoded file that provides you with a standardized way to send DigiCert your public key as well as some information that identifies your company and domain name. 
• When you generate a CSR, most server software asks for the following information: common name (e.g., www.example.com), organization name and location (country, state/province, city/town), key type (typically RSA), and key size (2048-bit minimum). 

Before you can order or renew an SSL/TLS certificate , it is recommended that you generate a Certificate Signing Request (CSR) from your server or device as follows. 

How to generate a CSR

1. Login to the machine where a CSR is needed. 
2. Start Internet Services Manager.
3. Click Server Name.
4. From the center menu double-click Server Certificates in the Security section.

4. Select the Actions menu from the right. Click Create Certificate Request.

5. The Request Certificate Wizard will appear. In the Distinguished Name Properties window enter information as prompted. Click Next.

6. In the Cryptographic Service Provider Properties window leave both settings at their defaults (Microsoft RSA SChannel Cryptographic Provider and 2048). Click Next.

7. Enter a file name and location to save your CSR to.

8. Your CSR will now be saved to the location you selected in the file you named. Now you will need this CSR to enroll for your SSL Certificate.
9. Once you got back the Cert from the Cert Authority, we will need to convert it to PFX. Follow this article on converting a cert to PFX -How to convert a cert to PFX