Believe me it works !!! and i seem to remember it was a supported feature, I will dig out the tech bull later...
The only problem there was when people used ipoffice 2.0 manager on a 2.1 switch and it corrupted the config and for some reason every one thinks that using the new manager on old systems doesn’t work…
Its the usual avaya if it doesn’t work its not supported, if it does it a feature….