No - the messaging account Unity creates for this purpose is special and you can't point us at a different account. You can change the display name on the account if you wish but we must use that account.
These are the paths to get to each CCX logs through CLI. They may be helpful if you are having issues accessing RTMT or downloading logs through it.
If you want to download them you have to prefix "file get " and you can add one of the options (re...