I was able to get a bit farther in my attempt to use schedule unmanage of my nodes. I grouped by region and successfully did it by selecting the all nodes in the region.
NOW I need to find out what servers I set to unmanage tonight as we want them to be managed now. (long story which I'll divulge if anyone is interested)
What I'm really looking for is a page/report/menu/app where I can see what servers are scheduled to be unmanaged during tonight's patching window.
Urgent help needed, please!