Enter 2 email addresses for a contact

This is a HUGE issue with me. My target market is required to have their official business email monitored by compliance. As a result, there are messages that I need to send and track from their personal email address to avoid the monitoring. This is a MUST HAVE! With Microsoft adding a mini CRM to 365, I may have to use that instead if this isn’t fixed. Particularly if they integrate it with LinkedIn.