E-mail type EX vice SMTP

I am using Outlook 2003 and office XP Pro. I have copied some of my office
contacts from the global address book to my contacts list. This brings the
file in as type EX. I download my contacts to my PDA and also to my personal
computer so when I am not on the company "system" the EX does not work. I've
tried replacing the EX e-mail name with the SMTP address (with the domain and
all). The new format takes, but the e-mail type is still EX. I have tried
making a new contact and just typing the information in directly, but it
still converts back to the EX. Can I change this so all my e-mails can use
these contacts whether I'm on the company net or not?
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Thanx