Even as it is important to be supportive and accommodating for a disabled student, it is perhaps even more important to hold them to as high of standards as you would hold anyone else. Don’t expect anything less of them or their academic work.
From my experience, I can attest that it is very disappointing and frustrating to realize you are being held to lower standards than your peers. Advisors, you will find that disabled students are often willing to put in an extreme amount of effort to compensate for their disabilities. Hold them to equal standards, and they will find a way to meet them.