Always make a point to understand your audience, I have seen many times technical people speaking to the business and not talking at the right level and emphasizing technical information like security, protocols and interfaces. An example application A will push the actuals to application B (good) instead of saying Application A attributes are connecting to table AR_Actuals and the trigger releases the information into Application B table GL_Open_balances. 

Depending on your audience adapt your architecture diagrams. In my view, here is a sample architecture of a business architecture diagram that will connect with business to initiate architecture discussions.