Customer: We bought this PR software package. It's fabulous. It does exactly what we want. Can you install it on a server please.
Customer: Why can't people access it on the Intranet?
I.T.: The software is client server, it does not work in a browser.
Customer: Hello, Servicedesk! I'd like to log a call please. Please build us a web interface for our PR software.
And in another very similar situation, I.T. were unable to build a web front end for another customer bought system. A few days later the customer was overheard saying in a meeting "Yeah, we asked I.T. to web enable it but the too difficult light came on".
And don't get me started on 101 instances of "we've got this Access database that John wrote. John's left the company now and so you will have to support it"