I can't seem to find an answer to this, or what I did find didn't seem to apply.
I have a vCenter server 5.1 with all my hosts running ESXi 5.0. I realized I had licensed two hosts with Enterprise Plus when what I needed was to apply a standard license for them, but when I go to manage licensing for these hosts, the option to select one of my available Standard licenses is grayed out.
Using the product comparison page here, I'm fairly certain I'm not using any Enterprise Plus features anymore, so I'm wondering if anyone else has seen this or has any other ideas?
Ahh, figured this out myself. All of my licenses were 1 cpu, so all I had to do was combine them in My VMWare and bam, the option was available to downgrade.