What is the legal ruling, according to the Four Schools of Thought, on the waqf administrator discharging the waqf tenant from the rent, and do the beneficiaries then have the right to claim it?

It is not permissible for the waqf administrator to absolve the tenant from paying rent, because he is entrusted with it and must act according to what is in the best interest and most beneficial. Nor is it permissible for him to rent for less than the market rate. If he does so, he is liable for the deficit, or the tenant is obliged to pay the full rent. Therefore, absolving the tenant from rent is even more strongly prohibited.