Set a remote CalDav server and reply to your seetings invitation directly in Roundcube Mail
RoundCube CalDAV 1.0 requires at least PHP 7.0. Dependencies are managed by composer, if you are interested in a list, see the composer.json file.
The supported versions of roundcube and supported databases can be found in SUPPORTED_ENVIRONMENT.md.
See INSTALL.md for installation instructions.
The module is currently available in English and French.
A (hopefully growing) documentation for various topics is found in the doc folder.