Which file contains the email info of user when i type a user nam.

[jeethu]

In outlook when i compose a new mail in the TO filed when i type a usre name
and press Crtl+K it gets resolved to the respective email address. I which to
know which file contains this information and how to modify this file.

 

[Michael Bauer]

It´s a contact folder, used as addressbook, e.g. in your *.pst file.