Secondray user has no own Calendar and cannot be added to Staff in Bookings

Secondray user has no own Calendar and cannot be added to Staff in Bookings

Hi Zoho Team,

I have a free mail license where both the primary email-address and the secondary email-address are hosted by my local provider, where I changed the DNS record to Zoho, so that both addresses could receive email on the Zoho- email platform.

Email works great: emails from both uses can be send from the mail box. I encountered following issues (and lost a lot of time trying to solve them):
  1. the is only one calendar, for th eprimary email-address; accepted meeting invitations for the secondary primary email-address end up there = in the calendar of the primary email-address 
  2. I cannot add the secondary email-address as user to Zoho CRM
  3. I cannot add secondary email-address as Staff to Zoho Bookings
  4. I cannot delete the secondary email-address from the account - in order to create a separate new account for this email address
How can this we solved?

Philip