Our organisation runs a single Exchange 2003 server. We have about 80 users on our network and have been usng this setup for nearly 2 years with no real problems.
Yesterday i sent an internal email to a colleague and she didn't receive it. When I go to message tracking in exchange system manager, the email has got as far as "started message submission to advanced queue", and this stage has been repeated every hour. It also caused my backup to fail last night because that item was down as being in use.
Can anybody tell me firstly why this may have happened and secondly how I can resolve it?