Setting up mutual CHAP authentication between Windows Server and a Lenovo IX2 is pretty easy and straightforward.
First you simply login to your IX2 and enable CHAP. Go through the steps outlined below.
One this is complete open the iSCSI initiator in Windows. You will want to now configure the CHAP authentication as outlined.
One that is complete you must run discovery. Those steps are here.
Now that you have ran discovery the last step is to connect the drive.