Contacts / CardDAV
Nextcloud ships a CardDAV backend for users to store and share their address books and contacts.
System Address Book
Nextcloud maintains a read-only address book containing contact information of all users of the instance.
Disabled users are removed from this address book.
Address Book Sync
The address book is updated automatically with every added, modified, disabled or removed user. Admins can also trigger a full rewrite of the address book with occ.