​@Martyn Potts are you creating a new conversation FROM intercom? I believe you must have multiple WA numbers associated to your account if I refer to this page: https://www.intercom.com/help/en/articles/9881518-connect-multiple-whatsapp-business-numbers

I don’t think there is a way to send from one versus another by default. The first configured number is probably the default one unfortunately. 

This guide was really helpful and easy to understand. I liked how you explained everything step by step achal kumari

By default, Intercom usually auto-assigns the sender based on your workspace’s WhatsApp setup and routing rules. There isn’t a direct way to set yourself as the default sender for every new WhatsApp conversation. The best workaround is to check the inbox assignment rules or the WhatsApp channel settings in your workspace,  sometimes those determine who appears as the sender.

If you want it to always be you, the cleanest solution is to adjust those rules or ask Intercom support if they can set the default sender on that channel to your profile.