The phrase "addressing them on" is correct and usable in written English.
It can be used when referring to the act of speaking to or communicating with someone about a specific topic or issue.
Example: "During the meeting, I will be addressing them on the new policy changes that will affect our department."
Alternatives: "discussing with them about" or "speaking to them regarding".
But at this point in the investigation, lawyers in the case said, he was almost certainly addressing them on the subject of indictments.
At a recent state party convention delegates loudly booed Joe Lieberman, despite the fact that this intelligent moderate was addressing them on a pre-recorded videotape.A good deal of Californian political discussion is locked in the 1960s.
A male teacher was addressing them on the origins of Shiism – he was using foundation texts to refute claims by hardline Sunnis that the Shias are a heretic sect and should be considered apostates.
Make a list of flaws and things you want to work on and address them one by one.
Jackson's supporters suggested that Adams and his wife had offered the sexual services of a young American girl to the Tsar of Russia while living in St . Petersburg rumors that grew so loud that one of Adams's supporters finally addressed them on the floor of the House.
When Congress doesn't act, the underlying problems don't go away — and a President will try to address them on his own.
The man of the moment stopped to address them on a loudhailer for a full 10 minutes before his ecstatic reception indoors.
Mr. Bush is expected to try to mollify Congressional Republicans by emphasizing his commitment to fiscal responsibility when he addresses them on Saturday in Philadelphia.
Yale's senior class gets to invite someone to address them on Class Day, which occurs on Old Campus the Sunday before Commencement each year.
Let's continue to fantasize: someone who's strong enough to push through to the heart of hundreds of problems and address them on behalf of the Haitian people, but who can also work with the international community.
The prisoners, many of them in light cotton clothing and plastic sandals, waited in 20-degree temperatures for Mr. Karzai to address them, on a lawn inside the old royal palace.
