Hello @RajP79032538207 

Is your requirement specifically to display the "Compose Email" button on the RITMs list view in Workspace: 

If yes, then share the code you are using.

If not, then active stream compose with email tab out-of-the-box can be leveraged here: https://www.servicenow.com/community/csm-forum/email-client-in-quot-compose-quot-section-in-record-v...