> ## Documentation Index
> Fetch the complete documentation index at: https://docs.davnode.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Thunderbird (Desktop)

> How to sync Davnode Calendar and Contacts using Mozilla Thunderbird on Windows, macOS, or Linux.

# Syncing with Thunderbird

Mozilla Thunderbird natively supports CalDAV and CardDAV standards, making it an excellent choice for desktop users on any operating system.

## Server Settings

You will need the following settings to configure your account:

| Service                | Server             | Port  | Encryption |
| :--------------------- | :----------------- | :---- | :--------- |
| **CalDAV** (Calendar)  | `mail.davnode.com` | `443` | SSL/HTTPS  |
| **CardDAV** (Contacts) | `mail.davnode.com` | `443` | SSL/HTTPS  |

***

<Note>
  We recommend to always use an **app password** for connecting calendars and
  contacts.
</Note>

## 1. Add Calendar (CalDAV)

To add your Davnode calendar to Thunderbird:

1. Open Thunderbird.
2. Click the **Calendar icon** in the left-hand navigation bar (or press `Ctrl` + `Shift` + `C`).
3. In the left calendar pane, right-click in the empty space below your existing calendars and select **New Calendar...**
4. Select **On the Network** and click **Next**.
5. Fill in the connection details:
   * **Username:** Your full Davnode email address.
   * **Location:** `https://mail.davnode.com`
   * **Offline Support:** Checked (Recommended).
6. Click **Find Calendars**.
7. You will be prompted for your **Password**. Enter your Davnode password and check "Use Password Manager to remember this password."
8. Select the calendars you wish to subscribe to from the list.
9. Click **Subscribe**.

## 2. Add Contacts (CardDAV)

To add your Davnode address book to Thunderbird:

1. Click the **Address Book icon** in the left-hand navigation bar (or press `Ctrl` + `Shift` + `B`).
2. Click the arrow next to the **New Address Book** button in the top toolbar.
3. Select **Add CardDAV Address Book**.
4. Enter the following details:
   * **Username:** Your full Davnode email address.
   * **Location:** `https://mail.davnode.com`
5. Click **Continue**.
6. Enter your Davnode password if prompted.
7. Thunderbird will validate the connection. Click **Continue** again.
8. Your Davnode contacts will now appear in the left sidebar under their own address book.

***

## Troubleshooting

### "Calendar Not Found"

If Thunderbird cannot automatically discover the calendars using the base URL:

1. Try using the specific path to your user's calendar. The standard format is often:
   `https://mail.davnode.com/calendars/YOUR_EMAIL_ADDRESS/default/`

### Read-Only Mode

If you can view events but cannot edit them:

1. Right-click the Davnode calendar in the sidebar and select **Properties**.
2. Ensure **Read-only** is unchecked.
3. If it remains read-only, check your network connection; Thunderbird often locks calendars if it cannot reach the server to sync changes.