I can repeat, probably this will help you to understand: there are commonly used features that Exchange admins force to disable on mobiles and there are less commonly used ones.

N900 didn't work with anything that required things beyond device lock (i.e. force mandatory device lock if Exchange account for this server is configured). If Exchange admin would set 'wipe out remote device' setting, N900 will report that it does not support it during provisioning step and Exchange server will deny provisioning. This was probably case #1 of all "N900 does not work with my Exchange server" issues.

Now, N9 does support remote wipe feature. If you Exchange server requires this feature, N9 will report that it supports remote wipe. If your Exchange server will try to enforce photo camera lock (so that it is impossible to take pictures), N9 will report that it does not support such feature and your Exchange server will deny provisioning.

So you really need to know what exactly your Exchange server enforces. Referencing other phones is irrelevant but I suspect that all you will encounter is remote wipe requirement and for that one the answer is "Yes, N9 will work with that server".