Just wanted to say thanks to the OP. I had a cert about to expire so I decided to give this a shot tonight. Keep in mind that a physical microcenter exists about 40 minutes across town.
My advice is to just ask nicely, be patient, and don't rage if they can't do it. I did have to request checking "core blue" since I explained it was an in-store only deal that won't be visible on a webpage but "I heard" it was in their system somewhere. The employee did have to ask for assistance in looking things up that way and then again for an override. But took me 10 min and worked.