Thinking about implementing Exchange SP2 with the new AKU 2.0 feature pack windows mobile 5 devices?
If you use ISA 2000 to reverse proxy your Activesync requests, I've come across an issue where the Exchange server cannot apply the new policies to a WM5 MSFP device.
In short, ISA 2000 has a bug in the way it deals with the OPTIONS verb, which is important for setting the SP2 management polices on the device when it connects.
To fix this, you need to do this:
http://support.microsoft.com/Default.aspx?ID=304340
Neil