Not able to scan workstations not in domain

Not able to scan workstations not in domain

We are using ManageEngine Service Desk Plus for asset management and helpdesk. Most of the workstations are in a domain say DOM1 and reamining are in WORKGROUP. The problem is that it fails to scan the systems in Workgroup. The ManageEngine server is running on a member server in DOM1 and the service runs in domain administrator account. In manageengine configuration, one domain, DOM1, has been configured with one domain administrator account. All systems are in same network say 192.168.0.0. So, is it possible to scan the systems which are not in domain but in workgroup? I dont see any workgroup configuration options there.. plz help.

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