# iOS Carddav account verification failed **URL:** \ **Category:** 📱 Desktop & mobile clients\ **Created:** [November 30, 2020, 8:40pm UTC](https://help.nextcloud.com/t/ios-carddav-account-verification-failed/99798 "2020-11-30T20:40:53Z")\ **Posts on this page:** 4\ **Page:** 1
**Author:** ![Alan](https://help.nextcloud.com/letter_avatar/alan/32/5_5575768a8748004e209b776fc1b2916d.png) [@Alan](https://help.nextcloud.com/u/Alan)\ **Post date:** [November 30, 2020, 8:40pm UTC](https://help.nextcloud.com/t/ios-carddav-account-verification-failed/99798/1 "2020-11-30T20:40:53Z")
Hello! I am trying to use NextCloud contacts on my iPhone and I keep hitting the “Carddav account verification failed” message. I am using the shared link: [https://example.com/remote.php/dav/addressbooks/users/USERNAME/contacts/](https://example.com/remote.php/dav/addressbooks/users/USERNAME/contacts/)" That you copy the link from and my username and password, I’ve tried some other variations as well. I’m not sure what to do. I’ve searched the site and it seems I found some older postest that didn’t help. Any ideas appreciated! ---
**Author:** ![j-ed](https://help.nextcloud.com/user_avatar/help.nextcloud.com/j-ed/32/7281_2.png) [@j-ed](https://help.nextcloud.com/u/j-ed)\ **Post date:** [December 1, 2020, 9:51am UTC](https://help.nextcloud.com/t/ios-carddav-account-verification-failed/99798/2 "2020-12-01T09:51:23Z")
Using the search function of this forum I found the following information: > [@\[Help\] NC11 + Mac Sierra Contact Sync URL](https://help.nextcloud.com/t/help-nc11-mac-sierra-contact-sync-url/7560/2): > > No bug in NC. Apple (both macOS and iOS) need the principal URL. Other clients need the address book url. also see [https://docs.nextcloud.com/server/11/user\_manual/pim/sync\_osx.html](https://docs.nextcloud.com/server/11/user_manual/pim/sync_osx.html) wink Would it be possible to simplify enrollment by performing server-side checks to determine client platform and redirect accordingly? No, because macOS Contacts will also access [https://FQDN/remote.php/dav/addressbooks/users/USER@TLD.COM/contacts/](https://FQDN/remote.php/dav/addressbooks/users/USER@TLD.COM/contacts/). And generally returning different results for different u… Additionally the Nextcloud user guide provides detailed information how to sync data: [https://docs.nextcloud.com/server/20/user\_manual/en/pim/sync\_ios.html?highlight=contact#contacts](https://docs.nextcloud.com/server/20/user_manual/en/pim/sync_ios.html?highlight=contact#contacts) ---
**Author:** ![wwe](https://help.nextcloud.com/user_avatar/help.nextcloud.com/wwe/32/72963_2.png) [@wwe](https://help.nextcloud.com/u/wwe)\ **Post date:** [December 14, 2024, 8:05pm UTC](https://help.nextcloud.com/t/ios-carddav-account-verification-failed/99798/3 "2024-12-14T20:05:37Z")
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**Author:** ![wwe](https://help.nextcloud.com/user_avatar/help.nextcloud.com/wwe/32/72963_2.png) [@wwe](https://help.nextcloud.com/u/wwe)\ **Post date:** [December 14, 2024, 8:05pm UTC](https://help.nextcloud.com/t/ios-carddav-account-verification-failed/99798/4 "2024-12-14T20:05:39Z")