The syntax that you use for specifying users in the vRealize Orchestrator Plug-in for Horizon workflows is consistent across all workflows.
When supplying a user name, you must specify the user and domain by using one of the following formats:
If you have users in multiple domains, you might have users or groups with the same name but different domains. When using the search feature, you might see a list of users that have the same name. The list returns only the user name, and not the domain name. To see the complete domain name for a user or group, point your mouse at the name. A tooltip appears that shows the complete domain name.