Standards-based services for Apple devices
With support for the IMAP mail protocol, LDAP directory services, CalDAV calendaring, and CardDAV contacts protocols, iOS and macOS can integrate with most standards-based environments. If your network environment is configured to require user authentication and SSL, iOS and macOS support 128-bit encryption and X.509 root certificates issued by the major certificate authorities.
In a typical deployment, Apple devices establish direct access to IMAP and SMTP mail servers to do the following:
Send and receive mail wirelessly (for Mac computers, wirelessly or via Ethernet)
Set VIP status in message threads
Wirelessly update notes with IMAP-based servers
Apple devices can connect to your organization’s LDAPv3 corporate directories, giving users access to corporate contacts in the Mail, Contacts, and Messages apps. CardDAV support lets your users maintain a set of contacts synced with your CardDAV server using the vCard format. This synchronization lets users do the following:
Create and accept calendar invitations
View an invitee’s calendar free/busy information
Create private calendar events
Configure custom repeating events
In Calendar, view the week numbers (which week out of 52 weeks in a year)
Receive calendar updates
Update tasks with the Reminders app
All network services and servers can be within a DMZ subnetwork, behind a corporate firewall, or both.