Hello, I have a relative who works in the property. He didn't pay the property fee because of the housing problem, but the property management manager said it was legal to deduct it from his salary.

Illegal. There is no legal basis for refusing to pay property fees because of housing quality problems. This is not part of the property service contract. However, property companies that refuse to pay fees can safeguard their legitimate interests through legal means, and it is illegal to deduct employees' wages on this ground. These are two situations, which are irrelevant in theory. Your relatives can sue your company for deducting employees' wages without justifiable reasons. As for whether the company will recover the property service fee, it is a matter for the property company.