So as far as I understand, if the device isn't provisionable and your employer wants you to lock your phone to be able to sync with MfE (aka requiring the provisionalbe device), you're out of luck - no MfE for you?

And it was delibrate decision to leave it out.. because you don't like it personally? Or you're just not willing to make it issue because you don't like it personally, unless we find some other way to tell Nokia that it's important?

One might imagine that if your employer requires this setting, it's because it's corporate policy to require that the device is locked if you sync it with MfE (at least this is how it is where I work). This kind of is logical: I doubt that many corporations would like that stolen/forgotten handset gives easy access to mail. If you don't like it and don't want to go along with the policies, then you don't have to sync your device.

So it's not a question about storing personal stuff to your phone, it's about securily accessing the work related information that's often something these companes don't want to ending up in wrong hands.

At least maemo.nokia.com says following:

I don't see any warnings that it might not work in certain situations, so I'd at least expect that it would work where other MfE clients too. Am I missing some basic understanding about how MfE works, aka this support for provisionable devices just some extra feature that shouldn't be there? If not, the it would be completely reasonable to expect that it would work as advertised.