Meeting request being bounced back by OLD bb server address

[corbb]

When ever a meeting request is sent the sender gets the email bounced back. However I still get the request.

This is what they get:

The following recipient(s) could not be reached:

/O=CORSECURITY/OU=FIRST ADMINISTRATIVE GROUP/CN=RECIPIENTS/CN=BlackberryAdmin on 10/21/2011 1:14 PM
The e-mail account does not exist at the organization this message was sent to. Check the e-mail address, or contact the recipient directly to find out the correct address.
<corsecurity.com #5.1.1>
..................

Ok now for some background.

Several years ago I installed the Blackberry Server on the company's 2003 server. The Blackberry Server was of the one user variety. That was uninstalled and the Blackberry was not used until a year or so ago. When I went back to the Blackberry. At that time I installed the new Blackberry Express Server.

The response above is from the old (previously installed) Blackberry Server. I know this because I named them differently. After the installation of the old Blackberry Server people were getting their emails bounced back saying deliverable but I would still get the emails. I corrected this years ago but I don't remember how. However the meeting request bounce back was never fixed. I didn't worry about it at the time because I wasn't getting that many outside meeting request. It was mostly internal. But now it is becoming very very annoying.

I looked in the Exchange manager and there is no user by the name BlackberryAdmin. I have poked around a lot over last couple of years but I just can't get this done on my own. Does anyone have any ideas?