In the Allocation & Forecasting screen, user needs to allocate time for one project and activity to all employees. Is there a way to do this as a group rather than individually?
Yes, you can either pick an individual Resource (employee/consultant) or a Group from the drop-down. All individuals and groups are in the same Resource drop-down. You should see All Employees group there and assign it to the relevant project and activity. Check the Core Help for details.