At a meeting/conference vs In a meeting/conference

At. If you want to make sure for yourself — try Google.com.

In the US, if the person is on site, but unavailable due to a meeting, he's in a meeting.

If he is away from the site because he has travelled to a meeting, he's at at meeting.

I'll be in a meeting today from 3-4. Next week, I'll be at a meeting in Denver.

Grammar GeekIn the US, if the person is on site, but unavailable due to a meeting, he's in a meeting.

If he is away from the site because he has travelled to a meeting, he's at at meeting.

I'll be in a meeting today from 3-4. Next week, I'll be at a meeting in Denver.

Thank you for clarification! I knew this was a

Making it a bit more complicated, I've come to learn that there are some differences in prepositions even between the US and the UK, so you may find other answers. You'll get the US "business English" version from me in most of my answers.

Appreciate if you advise on the sentence. " Please confirm through/via/ in the email that you argree with the statement as previously discussed at/in/on the meeting.

Thanly you in the advance.

Greart explanation, thank you!

Hi there. Well, as an answer to your question, I believe that "He's at a conference" means that he is occupied with this activity at the moment; not necessarily being in the room which such conference is going to take place, but, maybe, somewhere nearby, doing something related to it. "In" would mean just the opposite of what was previously stated.