Just wondering if anyone can help me. I am using webmessaging with Salesforce Plugin. Is there any way /setting we can do , so when interaction come, the widget not display as "guest" instead custom attribute or contact name ?
Yes, you can. You can do that by linking the web messaging interaction to an external contact. You need to:
Find out what external contact you should link the interaction to.
Use the /api/v2/externalcontacts/conversations/{conversationId} in your messaging flow to associate the interaction to an external contact. You need the the messaging session ID, the media type and the conversation ID to do this.