Quick answer
Check the order and the institution’s lawful access requirements.
Do now
Obtain the relevant custody terms and contact the school or provider through official channels. Ask what documentation is needed for your own authorized access. Keep a record of specific information requests and responses.
Watch for
Protection orders, confidentiality rules, and particular medical services can limit disclosure. Do not use another person’s password or impersonate them to enter a portal. Seek clarification when rights are disputed.
Official sources
NJ Courts — FD modification application packet, NY Courts — Custody and Visitation, DC Courts — Family Court Self-Help Center.