Connecting your CalDAV server

When you add a connection, you pick a server type. CalDAVconnect then fills in the CalDAV path, authentication method and (where relevant) the default URL, so in most cases you only provide three things:

Server URL — the base address of your server (for example https://cloud.example.com), without the CalDAV path.
Username — your account name on the server.
Password — ideally a dedicated app password, not your main login (see below).

Pick your server — or choose Generic

CalDAVconnect offers ready-made presets for the most common servers, so the technical details are filled in automatically:

Nextcloud
SOGo
Baïkal
Radicale
Posteo
mailbox.org
Synology Calendar

Don't see your server? Choose Generic CalDAV. It works with any standards-compliant CalDAV server (RFC 4791) — for example Infomaniak, Zimbra, Fastmail, or a self-hosted SabreDAV. You may just need to enter the full CalDAV URL yourself (see Generic CalDAV below).

Use an app password where possible

If your server has two-factor authentication enabled, your normal password will not work for CalDAV. Create a dedicated app password (sometimes called device password or application-specific password) in your server's security settings and use that instead. App passwords can be revoked individually without affecting your main login.

Per-server specifics

The CalDAV path is added automatically — you don't type it yourself. The notes below cover the things that are easy to miss.

Nextcloud

URL: your Nextcloud base URL (e.g. https://cloud.example.com).
Create an app password under Settings → Security → Devices & sessions.
Path /remote.php/dav is added for you.

SOGo

URL: your SOGo/mail server base URL.
Path /SOGo/dav is added for you.

Baïkal

URL: your Baïkal base URL.
Baïkal uses Digest authentication — CalDAVconnect selects this automatically.
Path /dav.php is added for you.

Radicale

URL: your Radicale base URL.
Radicale layouts vary; if discovery fails, enter the full collection URL as your server URL.

Synology Calendar

URL: your NAS address including the port, e.g. https://nas.example.com:5001.
Enable CalDAV in the Synology Calendar package settings first.
If 2-step verification is on, create an app password in DSM.

Posteo

URL: https://posteo.de:8443 (pre-filled).
Enable calendar/CalDAV access in your Posteo settings.
Posteo exposes its existing calendar only — new calendars can't be created from CalDAVconnect.

mailbox.org

URL: https://dav.mailbox.org.
Enable CalDAV in your mailbox.org settings; use an app password if you have 2FA.
Like Posteo, only the existing calendar is available; new calendars can't be created here.

Generic CalDAV (everything else)

Choose Generic CalDAV for any RFC 4791-compliant server (Infomaniak, Zimbra, mail providers, self-hosted SabreDAV, and so on).
Enter the full CalDAV URL if path auto-discovery doesn't find your calendars.
Creating brand-new calendars may not be available; syncing into existing calendars works.

How your credentials are stored

CalDAV credentials are encrypted at rest (AES-256-GCM) with a key that is separate from the rest of the application data. They are only ever used to talk to your server.

Once the server is connected, connect Google or Microsoft 365.