Why is my CardDAV account not displayed on the iPhone?

If the CardDAV account is not visible on the iPhone or is not synchronized correctly, there may be several reasons for this. Possible reasons and solutions are listed below.

1. Check settings

Is the account set up correctly?

• Navigate to Settings Contacts Accounts.
• Check whether the CardDAV account is listed there.
• If not, add it again under Add account Other Add CardDAV account.

Are the server and login details correct?

• Check the server address, username and password.
• Test login with a different client (e.g. on macOS or Android).

Is synchronization enabled?

• Go to Settings Contacts Accounts [CardDAV account] and make sure that contact synchronization is enabled.

2. Troubleshooting with MacBook

If the above steps don't help, a detailed troubleshooting can be performed:

1. Connect the iPhone to a MacBook.
2. Open Console (macOS Utilities > Console).
3. Select the iPhone in the sidebar under "Devices".
4. Search for the term "Yikes" or for specific error messages such as:
   • failedToRetrieveAddressBookURLsWithError
5. Check the exact error message.
6. If such errors occur, this may indicate a connection problem with the server or a faulty configuration.