>>Are you sure? I don't think AD is used for the storage, AD is used for finding queues. The MSMQ data store is some proprietary format...
>
>I just read this the other day, I think in some Biztalk related material. I can't for the life of me figure out where now...
>
>It's possible that I read it wrong, and where it said the AD is used to find the queue, I thought it meant that's where stuff is stored. I'll keep looking... in the meantime, any insight on how to check for myself? I have several queues up and running here...'

MSMQ creates a directory on your disk, which you can check in the queue configuration manager in COntrol Panel. There are proprietary files there which store the actual content.