Business Unit & Group Incoming Email

Business Unit & Group Incoming Email

I set up BU in SCP with incoming mail is: scp@support.com and two groups IT & Finance with incoming mail: it@support.com and finance@support.com. I want to ask if user send mail for both email ID (scp & it or it & finance), which group that request assigned 
                New to ADManager Plus?

                  New to ADSelfService Plus?