You can setup a user defined field with a hyperlink enabled to search an Address Book entry's LinkedIn profile.
- Go to Administration Setup User Defined Fields.
- Click Field Select Formula Field.
- Return type should be Alphanumeric and enable Display as hyperlink.
"https://www.linkedin.com/people/search?firstName="+[First Name]+"&lastName="+[Last Name]+"&company="+[Company]
You can include this UDF in your Key Field and click on that field it will search LinkedIn profile of that Address Book entry.
And if they want to include company search …
"https://www.linkedin.com/people/search?firstName=”+[First Name]+”&lastName=”+[Last Name]+"&company="+[Company]