Global modifications

[Nick Milas <nick@eurobjects.com>]

Hello,

Is there a way to apply changes to all entries using ldapmodify or a 
similar tool?

I would like to add automatically to all our entries with a "mail" 
attribute, a new acceptedEmail attribute with the same values as the 
existing mail attribute.

The acceptedEmail attribute would be defined in a custom schema, under a 
new custom auxiliary objectClass: orgFunctionalData.

What would be the simplest way to do it?

Thanks in advance,
Nick