For those that want to quickly request a new SSL certificate via your Enterprise Certificate Authority, using a GUI instead of certutil commands, here is a tutorial on how to do so.

1. Login to the server you want the SSL cert with the SAN address.
2. Click Start->Run->MMC
   
   
3. Click File->Add/Remove Snap-Ins
   
   
4. Select Certificates and click Add >
   
   
5. Select Computer account and click Next >
   
   
6. Click Finish
   
   
7. Click OK
   
   
8. Expand Certificates (Local Computer)->Personal->Certificates
   
   
9. Right click on the right pane and select All Tasks -> Request New Certificate...
   
   
10. Click Next on the Certificate Enrollment screen
    
11. Select Active Directory Enrollment Policy and click Next
    
    
12. Check what type of certificate you would like to request and click on the "Click here to configure settings." link
    
    1. Note: you must have configured a template for this link to show up.  By default you will only see Computer, which will not allow you to request the certificate with the SAN address
13. On the certificate properties page, enter in the following info for the Subject name
    1. Common name
    2. Country
    3. Locality
    4. Organization
    5. Organization Unit
    6. State
14. On the certificate properties page, enter in the following info for the Alternative Name
    1. DNS of the FQDN (common name)
    2. DNS of the SAN name (short name)
15. You should now have something like this
    
16. Optionally, click on the Private Key tab, expand Key options, and check Make private key exportable
    
    
17. Click OK on the Certificate Properties window
18. Click Enroll
    
    
19. Click Finish once the request has been signed
    

At this point, you can export the certificate from the machine or have your application reference it.