You have an existing SAN certificat installed in yor IIS and you want to add a domain name to the certificate. Problem When you install the updated certificate in the IIS the new domain name doesn't appear in the certificate when you are viewing the certificate from the Security report (the lock) next to the address bar in the browser. Fix the problem Check if the "Print Spooler" and "Windows Remote Management" Services are started or not. Delete the old certificate from the IIS Import the new certificate to the IIS Run IISRESET /stop Run net stop http Run net start http Run IISRESET /start Verify that the "Print Spooler" and "Windows Remote Management" Services are started or stoped depending on the result in step 1.