I have one of my vendors setup up on Cliq so that we can discuss workorders. The workorder requests get pushed from CRM to Cliq and then any questions are resolved there. I would like to add buttons to some of the cards that I push with information that would allow him to respond back and have them invoke a function that pushes data back into my CRM, and wanted to know if the invoke function call linked to buttons could only invoke functions for users on my account, or if it could invoke for extenral users in an external channel I established.