It is generally helpful to document your accommodation request in writing, and keep a copy of the denial notice. Do not simply accept your employer’s denial without understanding your rights.
Ask your employer to explain the specific burden the accommodation would create. If the explanation is vague or inconsistent with how similar requests from others have been handled, that inconsistency matters. Contact Herrmann & Murphy to request an evaluation of your potential case, and whether the denial of your accommodation request was unlawful.