A better term for ‘Probationary’ periods

Q. Our company has an initial 90-day probationary period for all new employees. Our employee handbook clearly describes the probationary period and also contains an introduction stating that the company has the right to terminate its employees at any time with or without cause. Our attorney recently informed us that the two provisions may be inconsistent and recommended that we delete the handbook’s reference to a probationary period. Should we follow her advice? ...