MS RDP v8.0+ (comes with Windows 8 & Server 2012) uses UDP 3389 for RDP in addition to TCP. Furthermore, it also tries UDP first (this may be with v8.1 - can't remember).
I know I can workaround it - I just want to know when will the AppID itself be updated.
I opened a ticket but support told me to post it here as they didn't know.
Well, then it's working inconsistently.
After you posted that I went back to the logs...
For any AppID-only rule (ms-rdp & t.120) that uses TCP it works fine but all UDP is dropped.
For a rule that as 'any' for both App-ID & service, UDP works (I haven't tried it with TCP/UDP 3389 in the Services column but I expect it would have the same outcome).
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