Connecting Calendar & Contacts¶

Sync your Nextcloud calendars and contacts with your phone, computer, and email apps.

What You'll Need¶

Your Nextcloud server address (e.g., https://cloud.yourcompany.com)
Your username and password (or app password)
The app or device you want to sync

iPhone / iPad¶

Calendar¶

Open Settings
Tap Calendar → Accounts → Add Account
Select Other
Tap Add CalDAV Account
Enter:
Server: cloud.yourcompany.com (without https://)
Username: Your Nextcloud username
Password: Your password (or app password)
Description: "Nextcloud" (or whatever you like)
Tap Next
Enable Calendars
Tap Save

Your calendars will now appear in the Calendar app.

Contacts¶

Open Settings
Tap Contacts → Accounts → Add Account
Select Other
Tap Add CardDAV Account
Enter:
Server: cloud.yourcompany.com
Username: Your Nextcloud username
Password: Your password (or app password)
Description: "Nextcloud"
Tap Next
Tap Save

Your contacts will sync to the Contacts app.

Troubleshooting iOS¶

"Cannot connect using SSL":

Try using the full URL: https://cloud.yourcompany.com/remote.php/dav

"Account verification failed":

Double-check your username (might be email format)
Create an app password in Nextcloud (Security settings)
Ensure two-factor authentication is configured correctly

Android¶

Using DAVx⁵ (Recommended)¶

DAVx⁵ is the best app for syncing CalDAV/CardDAV on Android.

Install DAVx⁵ from Google Play or F-Droid
Open DAVx⁵
Tap + to add an account
Choose "Login with URL and user name"
Enter:
Base URL: https://cloud.yourcompany.com
User name: Your Nextcloud username
Password: Your password
Tap Login
DAVx⁵ will find your calendars and contacts
Select which to sync (check the boxes)
Tap the sync icon to start syncing

Your calendars appear in Google Calendar (or your preferred calendar app) and contacts in your Contacts app.

Using the Nextcloud App¶

The Nextcloud Android app can also sync calendars and contacts:

Open the Nextcloud app
Go to Settings (three dots → Settings)
Tap "Sync calendar & contacts"
Follow the prompts to install DAVx⁵ if needed
Authorise the connection

Windows¶

With Outlook¶

Option 1: CalDAV Synchronizer (Free)

Download CalDAV Synchronizer (free Outlook add-in)
Install and restart Outlook
Go to CalDAV Synchronizer tab → Synchronization Profiles
Click Add → Generic CalDAV/CardDAV
Enter:
CalDAV URL: https://cloud.yourcompany.com/remote.php/dav/calendars/USERNAME/
CardDAV URL: https://cloud.yourcompany.com/remote.php/dav/addressbooks/users/USERNAME/contacts/
Username and Password
Click Test then OK

Option 2: Outlook CalDav Synchronizer (Paid alternative)

Some commercial add-ins offer easier setup but require purchase.

With Windows Calendar App¶

The built-in Windows Calendar doesn't support CalDAV natively. Options:

Use Thunderbird (free, supports CalDAV)
Use a third-party app like eM Client
Access via Nextcloud web interface

macOS¶

Calendar¶

Open System Settings (or System Preferences)
Go to Internet Accounts
Click Add Account → Other → CalDAV Account
Enter:
Account Type: Manual
User Name: Your Nextcloud username
Password: Your password
Server Address: cloud.yourcompany.com
Click Sign In
Enable Calendars

Contacts¶

Open System Settings
Go to Internet Accounts
Click Add Account → Other → CardDAV Account
Enter:
Account Type: Manual
User Name: Your Nextcloud username
Password: Your password
Server Address: cloud.yourcompany.com
Click Sign In
Enable Contacts

Thunderbird¶

Calendar (Lightning)¶

Open Thunderbird
Go to Calendar (or install Lightning add-on if needed)
Right-click in the calendar list → New Calendar
Select On the Network → Next
Select CalDAV
Enter location: https://cloud.yourcompany.com/remote.php/dav/calendars/USERNAME/CALENDARNAME/
Enter a name and click Next
Enter credentials when prompted

Contacts (CardBook)¶

Install the CardBook add-on
Go to CardBook → Address Book → Add Address Book
Select Remote → Next
Select CardDAV
Enter:
URL: https://cloud.yourcompany.com/remote.php/dav/addressbooks/users/USERNAME/contacts/
Username and Password
Click Next and finish setup

Finding Your CalDAV/CardDAV URLs¶

If an app asks for specific URLs:

Calendar URL¶

https://cloud.yourcompany.com/remote.php/dav/calendars/USERNAME/CALENDARNAME/

To find the exact URL:

Log into Nextcloud web
Go to Calendar
Click the three dots next to your calendar
Click "Copy private link"

Contacts URL¶

https://cloud.yourcompany.com/remote.php/dav/addressbooks/users/USERNAME/contacts/

To find the exact URL:

Log into Nextcloud web
Go to Contacts
Click Settings (bottom-left)
Copy the CardDAV URL

Using App Passwords¶

If you have two-factor authentication enabled (or for better security):

Log into Nextcloud web
Go to Settings → Security
Scroll to "App passwords"
Enter a name (e.g., "iPhone Calendar")
Click "Create new app password"
Use this password instead of your main password

Benefits:

Works with 2FA enabled
Can be revoked individually
Doesn't expose your main password

Troubleshooting¶

"Unable to verify account"¶

Check the server URL (try with and without https://)
Verify your username (might be email format)
Create an app password
Check if the server is accessible in a browser

Calendars not showing¶

Wait a few minutes for initial sync
Pull down to refresh in mobile apps
Check you have at least one calendar in Nextcloud
Verify the calendar is selected for sync

Contacts duplicated¶

You may have multiple contact sources (Google, iCloud, etc.)
Check which account contacts belong to
Set Nextcloud as default for new contacts

Sync is slow¶

Initial sync takes longer with lots of data
Check your internet connection
Large attachments in calendar events slow sync