tdanner,
Basically, after I launched the script code to add the WMI credential that I listed on my previous post and then I went to the Orion webpage Settings, Manage Windows Credentials page, and I tried to browse for the credential names that were list on the table of that page, I could not find them on that page.
The the table on that page had a header of Credential name, User name, Assigned to nodes. On that table, I could not any entries right after I had launched the code to add the WMI credential for the node. It wiped out the list, but the list would return after about one hour or so.