How to Sync Google Workspace CardDAV Contacts with Microsoft Outlook (Address Book)

Microsoft Outlook is a powerful email and calendar application used by millions, but it lacks built-in support for CardDAV—the standard protocol used to sync contact data from services like Google Contacts, iCloud, Nextcloud, and others. This can be a hurdle if you're trying to keep your contacts in sync across devices and services.

Fortunately, there's a solution: you can use third-party tools to bridge the gap and enable seamless CardDAV contact synchronization with Outlook.

? Step-by-Step: Sync CardDAV Contacts with Outlook

1. Why Outlook Doesn’t Support CardDAV Natively

Outlook does not include built-in support for CardDAV, which means it cannot directly connect to servers offering contacts via CardDAV protocols. You’ll need a connector or sync tool to make it work.

2. Best Tool: Outlook CalDav Synchronizer (Free & Open Source)

The most reliable and popular free tool to sync CardDAV with Outlook is Outlook CalDav Synchronizer.

• ? Download: https://caldavsynchronizer.org/

• ? Supports both CardDAV (contacts) and CalDAV (calendars)

• ✅ Compatible with Google Contacts, iCloud, Nextcloud, Synology, and other CardDAV providers

3. Installation and Setup

• Install the tool and restart Outlook.

• Go to the new CalDav Synchronizer tab.

• Click Add new profile → choose Generic CardDAV.

• Enter:

  • Name (e.g., “Google Contacts”)

  • CardDAV URL (provided by your service)

  • Username and Password or OAuth token

• Map it to the Outlook Contacts folder you want to sync.

• Save and run Manual Sync, or set it to auto-sync.

4. Provider-Specific Tools (Alternative Options)

• Google Workspace Sync (GWSMO) – for paid Google accounts

• iCloud for Windows – sync iCloud contacts and calendars

• Synology Contacts Plugin – for users hosting their own server

? Security Tips

• Use app-specific passwords if your CardDAV provider uses two-factor authentication (2FA).

• Enable encryption (HTTPS) for all sync URLs to protect your data.

? Final Thoughts

Even though Microsoft Outlook does not support CardDAV out of the box, tools like Outlook CalDav Synchronizer offer a reliable workaround. Whether you're using a public cloud like Google or a private CardDAV server, syncing your contacts to Outlook is now entirely possible.