...
Browse to SBC then Navigate to Security > Users > Remote Auth Permission
Click 
to create AD User Group to Access Level Mapping
Fill in the required fields as below
| Field | Description | Mandatory / optional |
|---|---|---|
| Group Name | Specifies the name of a valid Active Directory user group to which a SBC Edge access level is assigned | Manadatory |
| Access Level | Select REST from the drop down | Mandatory |
Additional Details can be found here