Is it permissible for a person working in a dairy factory to sell a quantity of milk in the market without a license, exploiting his personal connections?

It is not permissible to take anything out of the factory without the permission of its owner or an authorized manager, based on the Almighty's saying: "And do not consume your properties among yourselves through falsehood," and the Prophet's (peace and blessings be upon him) saying: "It is not lawful for a person to take anything from his brother's property without his willing consent."