Does anyone know if there is a permission requirement that needs to set so that when a user accepts a meeting invitation from their Blackberry, the response is transparent rather than "on behalf of" the user?

Bumping the thread with an easier question.

We are using Exchange 2007, the name of the account that BES uses is "BES Admin", and when users accept or decline meeting requests from their Blackberry the meeting organizer gets a reply message: BES Admin on behalf of Joe User.

This does not occur with normal emails, those appear to be from the sender directly.

Is this normal behavior? My boss doesn't think it is, but I can't find any documentation on the issue.

Thanks for the help!

Did you ever resolve this? We just upgraded to 2007 and have the same issue.