We need a complete holiday planer for 30 Employees integrated in Zoho CRM (Enterprise Environment) Funktions: - show employee available vacation time - employee must request vacation - manager must authorize vacation - employee must designate a substitute - substitute is not allowed to request vacation during that time - vacation not used until 31st of Dec. has to be used until 30th April next year, otherwise it will be gone - show always available vacation actual year and from the last year remaining