Most likely I've missed something that is right in front of my eyes but
I am embarrassed to say it just beats me why an attribute that is listed
on schema mapping and filter is not included in synthetic add.

I've done 10 years of IDM and I've never had this problem before but now
with two recent drivers I've been working with, AD and Scripting, I've
had problems to include Internet EMail Address to synthetic adds to
subscriber channel. The attribute is in schema mapping and filter as a
synchronizable attribute and as far as I know this should be the most
basic thing.

Is there something else that keeps attribute from the synthetic add then
schema and filter?