An employee has no “right of privacy” in communications made using their company email address. This also would apply to employees’ communications with their attorney. Such communications, if made utilizing your work email or work computer system, are not protected by the attorney-client privilege.
This highlights the dangers involved when employees use their office email address for personal matters unrelated to work. Personal usage is never a good idea. (For further information on email in the workplace see EMAIL: DOs and EMAIL: DONT’S in Tracey’s Tips.)