URL needs to be in certain case letters

You can try something like this:

when HTTP_REQUEST {
    if { [HTTP::uri] equals "WebCenter" } {
         URL is correct case, do nothing"
    }
    elseif { string tolower [HTTP::uri] equals "webcenter" }
        HTTP::redirect "https://qweb.sys.com/WebCenter/default with a capital W and a capital C"
    }
}

Or, do you want to just fix it for them?