KJ, the NYC DOE shut off mobile activations on the exchange server in Fall 2011 due to inability to scale for the # of new activations. However, if you previously had your email account connected to an iPhone, Android Phone, or iPad, your account is already activated for mobile use.
The following information should work for MOBILE devices - so long as your account was on a mobile device prior to Fall 2011...
I am currently using the following information on my iPad and Android Phone:
Email: OUTLOOKID@schools.nyc.gov (What you entered is correct)
Server: mail.nycboe.net
Domain: central
Username: OUTLOOKID
Password: password
Mobile access is not supported by the Help Desk, etc. They only support the use of Centrally issued Blackberries. Also, the information above will not work for Mail, Outlook, etc. on a computer. Only principals and some central employees are authorized for access via desktop-based solutions. The rest of us are stuck with Outlook Web Access (with no easy way to download emails to stop getting over the limit notifications---a big frustration of mine).
Good luck!