I need to do this as well.  Currently, when the user authenticates with domain/username, the DNN profile is populated with username, firstname, lastname, street, city, state, zip and email address. 

I would like to add (and have tried!) more profile properties that match the other fields from the directory but this information is NOT being populated to the DNN profile fields.  Is there a specific trick to making this work?

Authentication is set to ASDIAuth, Type is Delegation, root domain is ou=employees,ou=users,dc=domainname,dc=com.  All other fields left blank exept email domain.   I get accessing global catalog, root domain, ldap all OK and a list of the 5 different domains found.

When I add new profile properties, is there a specific variable that has to be entered or if the 'Property Name" matches the directory field name, should it not be retrieved?

Any advice?

There are a certain set of common profile properties that are populated.  If your AD environment doesn't use the default names for these things, then they will not get populated.  There is nothing in the current code base which will allow you to assign profile properties to different AD fields or to fill in additional profile properties from AD. (If you don't mind modifying code, you can look at how I changed the function which fills in the profile values to allow me to get by this issue HERE.)