To create time off in Resource Planning.
For projects using Resource Planning you can manage time off for your team. When making assignments or filling resource requests from the Assignment Board, the resource bench reflects which people are available, assigned, or off. See What is the 'resource bench' in Resource Planning?
You can only enter time off for people added in Resource Planning. See Add People to Resource Planning.
You can create time off from two (2) places in the Resource Planning tool: