Requirements

• Your Nextcloud address (e.g., https://wolke.sh).
• Your Nextcloud username.
• Recommended: Use an app password instead of your normal password
  Nextcloud → profile picture → Settings → Security → Devices & sessions → create a New app password.

With 2FA you must use an app password.

Copy the correct address

With this address, eM Client will discover Calendars (CalDAV) and Contacts (CardDAV):

• https://<Nextcloud-address>/remote.php/dav
• (alternative, if configured) https://<Nextcloud-address>/dav

Note: The official Nextcloud base path for CalDAV/CardDAV is /remote.php/dav.

Configure eM Client

Add Contacts and Calendars (CardDAV / CalDAV)

1. Menu → Accounts → + → Contacts → CardDAV
2. Account address: enter the base URL
3. Enter Username & Password/App password → Next → set an account name (Tip: use the same name as your email account) → Finish

Post-setup

• Set the default calendar for invitations: Menu → Accounts → (your email account) → "General" tab → Default folders → Calendar
• Show folders: In the Calendar and Contacts sections, make the new folders visible.