This feature is only available in Enterprise Edition.
If enabled, the Allow Prompt for Network Credentials During Search setting will allow Identity Finder to pop up a dialog box and prompt you for the credentials of a remote computer. The prompt will only occur if Identity Finder cannot connect to the remote machine via existing or supplied credentials. Identity Finder will attempt to connect to all specified remote computers at the beginning of the search, so, all necessary prompts for all computers will appear shortly after starting the search. However, if you want to guarantee that the search will run without user interaction, you should disable this checkbox.
To view or change these settings, click the Settings button on the Tools and Options ribbon.