How to Override Blocked Auto-Forwarding for Select Users
http://support.microsoft.com/default.aspx?scid=kb;en-us;317652 MS Exchange 2000 and 2003 do not allow users to create auto-reply/vacation/forwarding rules
2003
Setting Mailbox Limits over 2GB
http://www.petri.co.il/setting_mailbox_limits_over_2gb.htm how to set mailbox storage limits over 2GB in exchange 2003