Redirecting URL with #

"" is a reserved character denoting a "fragment identifier component", the processing of which is a client-side operation. See rfc3986.

In the case you have described,

...//fqdn/myaccount//forms/moving

works when the primary resource, i.e. the default index page in the directory "/myaccount", which can be "index.html" depending on the configuration of your Web server, is available, which accounts for the two success situations you have described above.

...//fqdn/myaccount/forms/moving

fails because there is no primary content page in the directory "/myaccount/forms/moving" on your Web server.

Based on the information you have provided, a redirect from:

...//fqdn/myaccount//forms/moving

to:

...//fqdn/moving

can be achieved by setting up an HTTP header in the server response to any request for a resource in the directory "/myaccount" at your Web server:

Location: /moving/

. BTW, the browser should also append the original fragment identifier automatically if that's also what you want. See s7.1.2 of rfc7231.

If you want to utilize irules, here's a simple one:

when HTTP_REQUEST {
    if {[HTTP::uri] starts_with "/myaccount"} {
        HTTP::respond 301 Location "/moving/"
    }
}

.