[rt-users] Filling in custom fields from LDAP

[Jeff Blaine]

I'm looking to fill in custom fields with data retrieved
from an LDAP server.

That is, someone with permission to modify an existing
ticket will enter some data into a custom field, then
save the modification.  At save time, the code will
use that custom field to populate another custom field
with LDAP query results.

Would this best be done as a plugin?  A Scrip?  Other?