There are a few SharePoint web parts link this one
that you can use to create an instranet app for employee phone book but from my experience a client application always at your finger tip is much easier to use for contact information lookup than to go on the intranet for it. We use a small and very user friendly application called Corporate Directory. It is an address book software
that runs on the tray as an icon always availble in a click. Once installed it will detect your MS Active Directory domain and will read periodically all contact information from it. It has a simple search box that you can type any parameter in it such as name, title, department and it will show you contacts matching these crietria. Their web site is: http://www.corporate-directory.net
Edited by ronaldlopezcorp, 16 April 2012 - 05:57 AM.