You might have seen mention of the msExchOmaAdminWirelessEnable attribute floating around out there; it's a bit mask that controls whether an individual mailbox does, or does not, have access to various Exchange 2003 mobility features. Here's a handy tip: you set bits in the mask to
disable access to particular features, not to enable them! The default value of 0x0 means that all mobility features for that user are enabled. If you set it to 0x7, that turns off Outlook Mobile Access and Exchange ActiveSync. Leave the value at 0 unless you
want people asking why they can't get their email from their mobile devices...