I've been researching this one on the Net and not finding the solution so far. An employee is suddenly getting that error message in his Outlook 2003 when Outlook does its Send/Receive check. I've found one suggestion that said to rebuild the offline address book on the Exchange server. I did that and now I'm also getting that error message on my Outlook, which is actually installed and running on the Exchange server itself.
I've cleaned adware and ran Windows Update but still no solution. Any ideas? Thanks.