Users can add additional custom system properties that are not reserved by the system. If a property specified in the Property array does not exist, it is created. If a value for a property exists, it is overwritten. You cannot create or remove reserved system properties. Depending on the system property being set, the functionality of the report server may change. For a list of reserved system properties, see Report Server System Properties. If errors occur, no properties are set.
You can remove the value of a property by setting the property to an empty value.