Due to changes in the LinkedIn API the long running integration between Zoho CRM and LinkedIn will be discontinued, Zoho Reported in their own blog dated 23rd April 2014.
LinkedIn have, for now at any rate, chosen only to partner with MS Dynamics and Salesforce in terms of allowing these CRM systems to integrate to LinkedIn.
This will be a real blow to those Zoho CRM users, who are active on LinkedIn as it no longer means they will be able to interact with their LinkedIn connections from within Zoho CRM.
Rest assured Zoho are as disappointed as you are about this decision by LinkedIn and are working with them to try to include Zoho CRM on the LinkedIn partner list; we'll keep you informed!