CalDAV Calendar

CalDAV is an open standard for accessing and managing calendar data over HTTP. It extends WebDAV and uses the iCalendar format for events, tasks, recurring appointments, and attendee data.

Use the CalDAV backend when the target calendar system provides a compatible CalDAV endpoint.

Reference data model: AliasSubCaldav

Alias Configuration

The following example shows a CalDAV backend configuration, such as a connection to a Google Calendar through CalDAV.

Figure: CalDAV alias configuration.

Property	Description
host	Sets the host where the CalDAV service is available.
port	Sets the CalDAV service port.
security	Defines whether the connection uses SSL.
path	Sets the CalDAV path below the host and port.
subtype	Selects the CalDAV implementation subtype. Available values include NONE, BEDEWORK, APPLE, and GOOGLE.
disableAttendeeHandling	Controls whether ADITO writes participants directly to calendar entries or sends invitations instead.
utcOnly	Converts CalDAV appointments to UTC. Enable this only when required by another client, because recurring appointments can be affected across daylight-saving-time changes.
calendarLinkerAlias	Sets the database alias for the calendar linker.
linkerTimeout	Sets the query timeout for linker database access.
uidResolverType	Sets the UID resolver type.
uidResolverAlias	Sets the database alias for the UID resolver table.
uidResolverTable	Sets the UID resolver table, typically ASYS_UIDRESOLVER.

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User Configuration

Configure the user's calendarId with the email address or calendar identifier expected by the CalDAV backend.

Figure: Calendar ID user property for CalDAV account mapping.

When a CalDAV backend is active, configure the required credentials and calendar path in the user's extended calendar properties.

Figure: Extended user properties for a CalDAV calendar backend.

tip

For CalDAV servers with implementation-specific behavior, set subtype to the matching server family before testing recurring appointments and attendee handling.