We are currently running a dovecot mailserver(maildir) and postfix. - Ubuntu 18.04.6 LTS (Bionic Beaver)
Our new COO wants to sync his contacts and calendar with outlook(MAC) and iOS(iPhone) using our service.
Is there a way we can achieve this.
IMAP doesn't handle calendars or contacts. What you want is carddav and caldav. There are many solutions for that out there.