The phrase "to advise the office" means to give suggestions or recommendations to the people working in the office in order to help them make better decisions or improve their work. Full definition
I have been asked to review resumes, conduct interviews, and advise the office manager about which candidates to send offers to. (careerdigital.com)
It is your responsibility to advise the office if you have had a change in insurance. (elizabethperkinstherapy.com)
The Experiential and Technician Advisory Committee is responsible for advising the Office of Experiential Education and the Pharmacy Technician program. (sullivan.edu)