This cmdlet performs the following operations for clients and down-level (Windows 7) clients 1. Adds one or more client machine ...

This cmdlet performs the following operations for clients and down-level (Windows 7) clients 
1. Adds one or more client machine security group(s) to the DirectAccess deployment
2. Adds one or more DirectAccess client Group Policy objects in domain(s)
3. In a multisite deployment, adds one or more security group(s) of down-level clients to the DirectAccess deployment. These down-level clients can then connect only to the specified site
4. In a multisite deployment, adds one or more down-level DirectAccess client Group Policy object(s) in a domain(s)