grant send as permission in exchange server 2003

ah, its not easy. I haven't done that for a long time. there are 3 levels of permission.

send on behalf

and ???

and send as

to grant send as , in ADUC, grant send as permission .... Not enough... also need grant SELF send as permission.

in exchange 2003, one user can only have one primary email address, to send from a different email address.. not straight forward ...even if the other email address is the alias of the primary one...

there are thrid party production.... again all not 100% ...

also in outlook, need enable the "From" button...