Advise someone of something—give a person information or warning about something.
- The motoring organizations have advised motorists of thick mists on the mountains.
Advise someone on something—give a person recommendations or advice about something.
- We are experts in advising people on the best holiday to suit their personal preferences.
Note: The expression does not correlate in meaning with the phrase advise with someone on something—consult with a person about smth.
- He advised with them on all matters and followed their directions in all things.