This plug-in is abolished in SmartJobBoard ver. 4.2 and transfered to the main functionality of the software. It is not considered as plugin anymore but it is included in the software.
You can set up Linkedin settings on the Linkedin page of Admin Panel.
If you use version lower than 4.2 please refer to following article:
LinkedIn plug-in allows users registering / logging in to a job board using LinkedIn account, auto filling and synchronizing resumes, displaying Company Insider and User Profile Widgets, sharing jobs/resumes on LinkedIn, displaying LinkedIn People Search results with regular resume search results.
To make settings for the Facebook plug-in go to Admin Panel > System Configuration > Plugins > LinkedinSocialPlugin.
On the opened page you will see the following form:
LinkedIn API Key and Secret Key - follow the given instructions to get your own API Key and Secret Key and then paste them to these fields;
User Group - select Users Group(s) which users should be able to use LinkedIn connect option;
Allow Resume auto filling/synchronizing for Job Seekers - check this box to allow job seekers autofilling/synchronizing their resumes with LinkedIn profile;
Display Company Insider widget in company info block - enable this option to allow employers displaying Company Insider Widget on a job details page in the “Company Info” block;
Display LinkedIn user profile widget on Resume page - enable this option to allow job seekers displaying their brief info and a link to LinkedIn profile in User Info block on a resume details page;
Allow LinkedIn People Search for Employers - enable this option to allow Employers including LinkedIn people search results into regular Resume search results;
Allow Job Seekers to share Jobs on LinkedIn - enable this option if you want job seekers to be able to share certain jobs in their LinkedIn status.
To see the description of the way LinkedIn Connect add-on works for users, click here