The ability to be able to email to a secondary email address has become more important this past year.  It would be helpful if you could have the email default to the secondary if the primary email is blank or have it automatically CC the secondary email.  

Right now people are working from home and not always getting emails sent to their work addresses and the ability to add a secondary email address to ensure invitations, emails and appointment requests are received is so important.  We have had many requests to include both email addresses on communications to ensure it is received.  In addition many people have had job changes due to layoffs and it would be helpful for the system to include the secondary email address in case the main email bounces.  I would imagine this will be an ongoing issue.