ActiveSync Outlook to iPhone contacts field mappings

I am wondering the same thing. I can no longer enter custom fields. Worst, if I enter a second home phone number, the other one disapeer!

What gives?

Here is what we have found through testing. The following lists the names displayed in Outlook 2007 and the corresponding name on the iPhone running 2.0.1. We did not find that any fields from Outoll overwrote any other field on the iPhone, even though the field might have a duplicate name, like "work" and "home". In the case of the Home and Home 2 numbers in Outlook, we ended up with two (2) "home" entries on the iPhone. If there is only a "-" under iPhone it is because it did not sync:

Outlook iPhone
========= =========
Assistant assistant
Business work
Business 2 work
Business Fax work fax
Call Back -
Car car
Company company main
Home home
Home 2 home
Home Fax home fax
ISDN -
Mobile mobile
Other -
Other Fax -
Pager pager
Primary -
Radio radio
Telex -
TTY/TDD -

Sorry - the columns didn't format the way they were supposed to. However, the capitalized entries on the left (Outlook) correspond to the lowercase entries that follow (iPhone) The dashes that follow the capitalized entries mean 'no-sync'.

Here is the list again, hopefully more readable this time:

Outlook = iPhone

Assistant = assistant
Business = work
Business 2 = work
Business Fax = work fax
Call Back = -
Car = car
Company = company main
Home = home
Home 2 = home
Home Fax = home fax
ISDN = -
Mobile = mobile
Other = -
Other Fax = -
Pager = pager
Primary = -
Radio = radio
Telex = -
TTY/TDD = -

I tried but Car field does not sync to iphone (means it is gone once it gets to the iphone). Any suggestion on how to fix this mapping. The solution of copying all the phone numbers from Car field to another field can be time consuming.