CalDAV - CardDAV for Outlook and Thunderbird - CalDav Synchronizer

Outlook: CalDav Synchronizer

In addition to ActiveSync, you can also use the free Outlook plugin CalDav Synchronizer to connect Outlook with mailbox.
You can download it here: https://caldavsynchronizer.org/de/download/

After installation, you’ll find a new tab in Outlook: "CalDav Synchronizer"

Figure 1: The CalDav Synchronizer for Outlook.

Click on "+" at the top left (Figure 2) to define new profiles for calendars, tasks, and address books.

Figure 2: Click on to add a new profile..

Select the mailbox entry and click "OK".

Figure 3: mailbox is preconfigured and part of the standard selection.

Connect Resources

1. Enter your main email address as the username and provide your password.
2. Click "Load IMAP/POP3 Account Settings".
3. Click "Get IMAP/POP3 Account Settings".

Figure 4: Enter mailbox credentials and link to Outlook folders.

4. Then click on "Discover resources and assign to Outlook folders".

Figure 5: Use this menu to assign permissions to the imported folders.

Now follow these three steps for each tab (Plans, Address Books, Tasks):

5. Click the three-dot icon next to the resource.
6. In the following dialog, assign it to a matching Outlook folder or create a new one.

   
   Figure 6: Select a folder for imported data.

7. Review all settings and save by clicking "OK".

Thunderbird

To manage your mailbox plans with Mozilla Thunderbird, use the Lightning add-on (included from Thunderbird version 38.0).

Setup Instructions

1. Select the menu item:
   "File | New Calender | Plan" to connect a plan from the mailbox-Office.

2. In the dialog that opens, choose "On the Network" as the calendar location.

   
   Figure 7: Thunderbird configuration.

3. In the next step, select the format "CalDAV" and use the address:
   https://dav.mailbox.org/caldav/XXX
   Note: Replace XXX with the specific alphanumeric ID of your plan (see below).

   
   Figure 8: Thunderbird configuration.

To find the full address of your plan or task list (including the unique alphanumeric code), follow these steps:

4. Open the desired plan or task list in your mailbox-Office.
5. Click the icon with three horizontal lines next to the respective entry.
6. Select "Properties" from the menu.

Figure 9: Calendar properties.

The full address will be shown, for example:
https://dav.mailbox.org/caldav/Y2FsFi8hMC4z

You will need this address to integrate the resource into other applications.

7. In the next step, assign a name and a color to the plan for visual clarity.
8. Finally, enter your mailbox email address and password.

This completes the setup.

Note: If you encounter issues with the installation described here:

Many customers are very satisfied with the TBSync add-on. This add-on also requires an additional add-on called "Provider for CalDAV & CardDAV", but it offers more synchronization options and apparently a more robust sync experience.

OPTIONAL: Using Multiple Plans in Thunderbird

Warning: The following modification is at your own risk. No support or liability is provided.

1. Install Lightning Add-On – this is usually pre-installed in recent Thunderbird versions.
2. Open Thunderbird Settings.
3. Click on "Advanced", then go to "General" and choose "Config Editor".

   
   Figure 10: Thunderbird advanced settings.

4. Confirm the warning: "Show All"
5. Search for calendar.network.multirealm, then double-click the result and change the value from false to true.
6. Restart Thunderbird.

If you experience issues with this method, many users report good results using the TBSync add-on, which requires an additional plugin:

"Provider for CalDAV & CardDAV". It offers more synchronization options and generally more robust performance.