Answer depends on your Outlook version which you failed to post.
Answer is also posted here daily. Find one that matches your version.

Signature
Russ Valentine
[MVP-Outlook]
> My Contacts are Filed or sorted by last name
> In a new email when I click on To...it openes my email addresses sorted by
> first name. How can I change to get them sorted by last name?
Don Z - 01 Jul 2006 18:45 GMT
I am using Outlook 2002 SP3
Don
> Answer depends on your Outlook version which you failed to post.
> Answer is also posted here daily. Find one that matches your version.
> > My Contacts are Filed or sorted by last name
> > In a new email when I click on To...it openes my email addresses sorted by
> > first name. How can I change to get them sorted by last name?
Russ Valentine [MVP-Outlook] - 01 Jul 2006 19:56 GMT
Then you will find this answer already posted here countless times:
Go to Tools > E-mail accounts > View or change existing directories or
address books > Outlook Address Book > Change. > Set your sort order there

Signature
Russ Valentine
[MVP-Outlook]
>I am using Outlook 2002 SP3
>
[quoted text clipped - 6 lines]
>> > by
>> > first name. How can I change to get them sorted by last name?