To add a Dynamic Actor role:
Right-click the Roles folder in the Navigator pane, and click New... in the shortcut menu.
On the General tab, type the name of the new role in the Name box and type a description (optional) in the Description box.
Note: The role name must be unique from all other user and role names.
Click the Rule tab.
Click Dynamic Actor in the Rule list.
In the Work Item Property box, type the name of the work item property that will contain the user name or role name to which the dynamic actor role will assign a work item version. The work item property must be entered in the form:
<WorkItemType>.<metadata>
For example:
SupportRequest.assignee
Note: If the dynamic assignment you created failed, there are two reasons for this: first reason is the property you assigned to does not exist or if it exists the value didn’t resolve to a valid user or role. If the work item property doesn’t resolve to a valid user or role, the sys.workitemversion.error flag in the work item version will be set to true and the work item will be sent to the next activity.