APM and Citrix

Without using the APM module why couldn't I just repoint the NAT rules from (Outside to Inside) to (Outside to F5 to Inside), and all is the same, correct?

You absolutely could continue to do this on an LTM, or you could create VIPs for each instance. But here's what APM gives you:

1. The ability to replace secure/access gateway. I understand you're not using one now, but this would also eliminate the need for multiple NATs.

    

2. The ability to replace the web interface. APM can deliver the XenApp icons, XenDesktop icons, and also RDP, VM View, portal resources, SSLVPNs, and links all on a single "webtop". You don't have to replace web interface, but it's a pretty cool capability. if you replace the web interface and gateway functions, all traffic (web and ica) can exist on a single port 443 vip.

    

3. The ability to replace secure ticketing. Again, this doesn't affect you because you're not using a gateway, but it's an additional layer of security that provides, among other things, a time-sensitive ticket. APM doesn't have to, but can absolutely replace this function.

    

You can effectively remove everything but the xml brokers and app servers from your citrix farm.