You use the Advanced tab of the Type Mapping dialog box to specify the names of the fields in your Master and Target systems that are used to store the unique ID of the types you are synchronizing -- if you are synchronizing stories and defects, you would enter the names of those fields here, for example.
If you are editing an existing connection, click the
Edit button (
) on the
Types and Fields tab of the
Update Connection window, and then click the
Advanced tab.