Hello Sai,
With CRM 7.0 EHP1, SAP introduced it's own CRM Instant Messenger tool that is fully integrated with the Interaction Center and other CRM WebClient business roles. This tool uses SAP proprietary technology rather than e.g., Microsoft Lync. With the SAP CRM Instant Messenger tool you can not only send instant messages to other internal CRM users, but you can also transfer screens, initiate phone calls, send emails, and check online presence info. This functionality does of course require CTI integration such as SAP Contact Center (formerly SAP BCM).
Unfortunately I am not aware of any way to integrate Microsoft Lync or Microsoft Communictor into the SAP CRM WebClient.
Warm regards,
John