Office 365 and head@ style addresses
I have setup each user with their first initial and surname username e.g. "firstname.lastname@example.org" in order to keep everything the same in terms of how people log into different systems. However, I need to be able to assign "email@example.com" to the Head (obviously!) but cannot work out how to do so that she logs in with jbloggs@ but emails are sent to and from head@. How have you set this up and is there a way I can do what I want?
P.S. I already have office@ as a shared mailbox with the relevant people assigned FullAccess and SendAs but don't think this is appropriate for the head@ address specifically.