An overallocation occurs whenever a resource's maximum units have been exceeded for any period of time. In many resource views, including the Resource Usage view, overallocated resources are shown in red.
Review the timescale portion of the view to see how work is allocated over the selected time period. Review the resource names and their assigned tasks in the table portion of the Resource Usage view. In the Task or Resource tab, click Resource Usage in the View dropdown menu. View a list of resources who are overallocated
Review availability for enterprise resources by using Project Online Review resource workloads by using the Resource Usage view
