Looks more interesting this to me , I need a simple code without invoking the VCO . , either adding a build profile or property dictionary in blue print or simple external stub.
Currently VCAC provisioned machine will add the VRM Owner in provisioned machine "annotation" summary , I need same value in EID tab in annoations
Looking forward to hear from you all.
You referred to an answer from another community posting...
In my answer there I recommended what you have posted which does "Annotations".
So if you really want "Annotations" that should work, but I think in the other community it was either asking for "Tags" which is a separate entity in the vSphere api and is not supported by custom property as of yet, there are feature requests pending.
If you really want tags, I'm uncertain of any way other than workflow or a powershell integration as implied by the other community.