I mean for a desk job at a call center, with zero physical work. The employee brings his own chair, and it fits under the desk just fine. The employer says he can't bring the chair without a doctor's note saying it is medically necessary. ADA says they can't ask if someone has a disability. ADA also says they must make reasonable accommodations if a disability is proven. Accommodations are described as changes to the job or environment. Lots of employers have this policy. I wonder if it is legal.