Aside from the "Maintenance and Service" section in the owner's manual (download latest from here), Autel has not ever released a formal maintenance schedule or program for the EVO II series.
Some EVO II Maintenance Tips from the Advexure Team
Always inspect props for cracks, chips. Inspect propeller mounts. Keep motors and vent areas clean and free from debris. Inspect your gimbal rubber dampers, over time these typically need to be replaced (use gimbal lock for transport to reduce stress on dampers). Carefully inspect arm hinges. Keep an eye on airframe shell for cracks and stress fractures over time. Monitor your battery cycles and performance through AirData.