CalDav and CardDav Sync not possible with iOS (firt report form iOS version 10.3.3)

[GamerBene19]

Steps to reproduce

1. Make Nextcloud accessible via https://[Server-IP]/nextcloud via an Alias
2. Setup a fresh Nextcloud install in /var/www/nextcloud
3. Activate Contacts, Calendar and Tasks App
4. Try to add Cal- or CardDav Server in iOS Settings as described here

Notes:

• As described here I made https://[Server-IP]/nextcloud/.well-known/cal|carddav and via an Redirect entry in the Apache Conf also https://[Server-IP]/.well-known/cal|carddav pointing at https://[Server-IP]/nextcloud/remote.php/dav
• Sync between Nextcloud and Thunderbird (CardBook for Contacts and Lightning for Calendars works just like it should

Expected behaviour

iOS beeing able to find and setup the Cal-/CardDav Server correctly

Besides the fact that it requires manual editing of Cal-/CardDav Settings to get (at least CardDav) working
is this a known problem and is there a fix for it (after searching multiple days I didn´t find a solution)?
And is there a way to get it working without manual editing?

Actual behaviour

iOS displays message that sync via SSL is not possible (SSL enabled and working correctly)
After manual setting up the settings for SSL and the Account URL at least CardDav seems to work somehow, but CalDav doesn´t

Server configuration

Operating system: Rasbian (Debian) Jessie/8

Web server: Apache2

Database: MySQL

PHP version: PHP 5.6.30 (output of php -v)

Nextcloud version: The current stable release (12.0.2)

Updated from an older Nextcloud/ownCloud or fresh install: Fresh install

Where did you install Nextcloud from: As described here from the .tar.bz2 archive

Signing status: No errors have been found.

Signing status

No errors have been found.

List of activated apps:

App list

Enabled:

• activity: 2.5.2
• bruteforcesettings: 1.0.2
• calendar: 1.5.3
• comments: 1.2.0
• contacts: 1.5.3
• dav: 1.3.0
• federatedfilesharing: 1.2.0
• federation: 1.2.0
• files: 1.7.2
• files_pdfviewer: 1.1.1
• files_sharing: 1.4.0
• files_texteditor: 2.4.1
• files_trashbin: 1.2.0
• files_versions: 1.5.0
• files_videoplayer: 1.1.0
• firstrunwizard: 2.1
• gallery: 17.0.0
• logreader: 2.0.0
• lookup_server_connector: 1.0.0
• nextcloud_announcements: 1.1
• notifications: 2.0.0
• oauth2: 1.0.5
• password_policy: 1.2.2
• provisioning_api: 1.2.0
• serverinfo: 1.2.0
• sharebymail: 1.2.0
• survey_client: 1.0.0
• systemtags: 1.2.0
• tasks: 0.9.5
• theming: 1.3.0
• twofactor_backupcodes: 1.1.1
• updatenotification: 1.2.0
• workflowengine: 1.2.0
  Disabled:
• admin_audit
• encryption
• files_external
• user_external
• user_ldap

Nextcloud configuration:

Config report

"instanceid": "ocvf2bnn26s2", "passwordsalt": "***REMOVED SENSITIVE VALUE***", "secret": "***REMOVED SENSITIVE VALUE***", "trusted_domains": [ "Server-IP" ], "datadirectory": "\/media\/hdd1\/NextcloudData", "overwrite.cli.url": "https:\/\/Server-IP\/nextcloud", "dbtype": "mysql", "version": "12.0.2.0", "dbname": "nextcloud", "dbhost": "localhost", "dbport": "", "dbtableprefix": "oc_", "dbuser": "***REMOVED SENSITIVE VALUE***", "dbpassword": "***REMOVED SENSITIVE VALUE***", "installed": true, "memcache.local": "\\OC\\Memcache\\APCu"

Are you using external storage, if yes which one: None

Are you using encryption: No

Are you using an external user-backend, if yes which one: None

Client configuration

Browser: None, as it is iOS itself acessing the Server.

Operating system: iOS 10.3.3

Logs

Web server error log

Web server error log

• (Later described as Try 1) When Trying to setup the CardDav Server (using https://[Server-IP]/ as value for Server; as described here )

Client-IP - - [20/Aug/2017:22:03:03 +0200] "PROPFIND /.well-known/carddav HTTP/1.1" 302
2842 "-" "iOS/10.3.3 (14G60) accountsd/1.0"
Client-IP - - [20/Aug/2017:22:03:03 +0200] "PROPFIND /nextcloud/remote.php/dav HTTP/1.1" 401 1868 "-" "iOS/10.3.3 (14G60) accountsd/1.0"
Client-IP - Benedikt Nerb [20/Aug/2017:22:03:03 +0200] "PROPFIND /nextcloud/remote.php/dav HTTP/1.1" 207 2371 "-" "iOS/10.3.3 (14G60) accountsd/1.0"
Client-IP - - [20/Aug/2017:22:03:05 +0200] "PROPFIND / HTTP/1.1" 405 707 "-" "iOS/10.3.3 (14G60) accountsd/1.0"
Client-IP - - [20/Aug/2017:22:03:05 +0200] "PROPFIND /principals/ HTTP/1.1" 405 708 "-" "iOS/10.3.3 (14G60) accountsd/1.0"

• (Later described as Try 2) After manual editing the SSL and Account URL options and saving (note that this automatically changed the "Server" value to the Account URL (in my case https://[Server-IP]/nextcloud/remote.php/dav/principals/users/Benedikt%20Nerb/) it worked.

Client-IP - - [20/Aug/2017:22:19:35 +0200] "PROPFIND /nextcloud/remote.php/dav/principals/users/Benedikt%20Nerb/ HTTP/1.1" 401 2006 "-" "iOS/10.3.3 (14G60) accountsd/1.0"
Client-IP - Benedikt Nerb [20/Aug/2017:22:19:35 +0200] "PROPFIND /nextcloud/remote.php/dav/principals/users/Benedikt%20Nerb/ HTTP/1.1" 207 2525 "-" "iOS/10.3.3 (14G60) accountsd/1.0"

• (Later described as Try 3) When Trying to setup the CalDav Server (using https://[Server-IP]/ as value for Server; as described here )

Client-IP - - [20/Aug/2017:22:39:31 +0200] "PROPFIND /nextcloud/remote.php/dav HTTP/1.1" 401 1864 "-" "iOS/10.3.3 (14G60) accountsd/1.0"
Client-IP - Benedikt Nerb [20/Aug/2017:22:39:32 +0200] "PROPFIND /nextcloud/remote.php/dav HTTP/1.1" 207 1823 "-" "iOS/10.3.3 (14G60) accountsd/1.0"
Client-IP - - [20/Aug/2017:22:39:33 +0200] "PROPFIND / HTTP/1.1" 405 707 "-" "iOS/10.3.3 (14G60) accountsd/1.0"
Client-IP - - [20/Aug/2017:22:39:33 +0200] "PROPFIND /principals/ HTTP/1.1" 405 708 "-" "iOS/10.3.3 (14G60) accountsd/1.0"
Client-IP - - [20/Aug/2017:22:39:33 +0200] "PROPFIND /calendar/dav/Benedikt%20Nerb/user/ HTTP/1.1" 405 729 "-" "iOS/10.3.3 (14G60) accountsd/1.0"

• (Later described as Try 4) After manual editing the SSL and Account URL options and saving (note that this automatically changed the "Server" value to the Account URL (in my case https://[Server-IP]/nextcloud/remote.php/dav/principals/users/Benedikt%20Nerb/) it results in the calendars beeing detected correctly and everthing seems to be fine until the calendars vanish

Client-IP - - [20/Aug/2017:22:59:55 +0200] "PROPFIND /nextcloud/remote.php/dav/calendars/Benedikt%20Nerb/ HTTP/1.1" 401 1320 "-" "iOS/10.3.3 (14G60) dataaccessd/1.0"
Client-IP - Benedikt Nerb [20/Aug/2017:22:59:56 +0200] "REPORT /nextcloud/remote.php/dav/addressbooks/users/Benedikt%20Nerb/contacts_shared_by_Johanna%20Nerb/ HTTP/1.1" 207 1785 "-" "iOS/10.3.3 (14G60) dataaccessd/1.0"
Client-IP - Benedikt Nerb [20/Aug/2017:22:59:56 +0200] "PROPFIND /nextcloud/remote.php/dav/calendars/Benedikt%20Nerb/ HTTP/1.1" 207 17420 "-" "iOS/10.3.3 (14G60) dataaccessd/1.0"
Client-IP - Benedikt Nerb [20/Aug/2017:22:59:58 +0200] "PROPFIND /nextcloud/remote.php/dav/calendars/Benedikt%20Nerb/feiertageoliver-nerb/ HTTP/1.1" 207 1630 "-" "iOS/10.3.3 (14G60) dataaccessd/1.0"
Client-IP - Benedikt Nerb [20/Aug/2017:22:59:59 +0200] "PROPFIND /nextcloud/remote.php/dav/calendars/Benedikt%20Nerb/personal_shared_by_Alexandra%20Nerb/ HTTP/1.1" 207 1645 "-" "iOS/10.3.3 (14G60) dataaccessd/1.0"
Client-IP - Benedikt Nerb [20/Aug/2017:23:00:00 +0200] "PROPFIND /nextcloud/remote.php/dav/calendars/Benedikt%20Nerb/personal/ HTTP/1.1" 207 1618 "-" "iOS/10.3.3 (14G60) dataaccessd/1.0"
Client-IP - Benedikt Nerb [20/Aug/2017:23:00:01 +0200] "PROPFIND /nextcloud/remote.php/dav/calendars/Benedikt%20Nerb/contact_birthdays/ HTTP/1.1" 207 1629 "-" "iOS/10.3.3 (14G60) dataaccessd/1.0"
Client-IP - Benedikt Nerb [20/Aug/2017:23:00:02 +0200] "PROPFIND /nextcloud/remote.php/dav/calendars/Benedikt%20Nerb/erc-heimspiele/ HTTP/1.1" 207 1624 "-" "iOS/10.3.3 (14G60) dataaccessd/1.0"
Client-IP - Benedikt Nerb [20/Aug/2017:23:00:03 +0200] "REPORT /nextcloud/remote.php/dav/calendars/Benedikt%20Nerb/feiertageoliver-nerb/ HTTP/1.1" 207 11016 "-" "iOS/10.3.3 (14G60) dataaccessd/1.0"

I think (quite sure) it´s this request, that ends the (working) sync of calendars

Client-IP - - [20/Aug/2017:23:07:14 +0200] "PROPFIND / HTTP/1.1" 405 707 "-" "iOS/10.3.3 (14G60) dataaccessd/1.0"

After this sync the Account URL in the CalDav Server value got set to https://[Server-IP]/.

Nextcloud log

Nextcloud log

Containing nothing regarding the Problems with iOS

Thanks for any help

[GamerBene19]

If needed I could also provide extra log files or try some solution approaches, to help solving the issue.

Also, i can confirm that the same error also exists in ownCloud 10.0.2.1. Calendars show up and start sycing just fine before they vanish.

Any possible solution for this issue yet?

I experienced the exactly the same issue on a Nextcloud 12 server given by a provider (ncloud.zaclys.com) and iOS 11.0.

After several tries, the server adress https://ncloud.[Server-IP]/remote.php/dav worked but not the one given by the contact app (https://ncloud.[Server-IP]/remote.php/dav/addressbooks/users/[User_ID]/contacts/).
Is this repo the good place to send this issue ? Or should we open an issue in the contact app repo ?

[j-ed]

@jomuller A good point to start looking for a solution is always to read the manual and/or ask ant G. 😉
There you will find a detailed description how an iOS synchronization need to be setup https://docs.nextcloud.com/server/12/user_manual/pim/sync_ios.html and how you can troubleshoot https://docs.nextcloud.com/server/12/admin_manual/issues/general_troubleshooting.html#troubleshooting-contacts-calendar .
or e.g.
https://wayneoutthere.com/tutorial-nextcloud-owncloud-calendar/

@j-ed I agree with you (RTFM principle). But I can't figure out why it doesn't work with the given URL in the App. I'm closer to an end-user than a developer, and I was about to give up after several tries, reading docs, forums... but it was my fault if I didn't read the general troubleshooting documentation. Can't it be possible to have only one way to sync that instead of 3 or 4 URL to try (with the risk to loose some users during the process) ?

[j-ed]

As far as I understood Apple is using a different approach than all others to address CardDAV/CalDAV ressources. I don't know why they're not using the usual address format, maybe the specialists could answer this question.

[GamerBene19]

Thanks for the answer @j-ed.
And thanks for referring me to the manuals (and the blog entry). But for solving my problem (which btw still exists) I already read and executed the steps described in the manuals and the blog entry.
And if those steps would have solved my problem, this issue wouldn´t exist.
Thanks for commenting anyway (and sorry if the tone was a bit rough; not on purpose)

[GamerBene19]

After some troubleshooting this weekend I found, what caused the problem (at least for me).
I started from scratch and began with installing Nextcloud as described here and after setting everything up I discoverd the exact same issue again.

I just found out, that the error was caused by a space (" ") in the username. (My username was like "XY Z")

I added an account named test (for testing obviously) and with no space in the username everthing works just fine (for me).

For me this was the solution for the issue. Idk if anything configured before the reset was related to the problem.

[j-ed]

@GamerBene19 To understand the problem better, can you please explain where the space has exactly been entered, on your iPhone, as you set-up the Nextcloud account etc.? Has it been entered erroneously or was it part of the original account name?

[GamerBene19]

@j-ed The 'old' account name was sth like "XY Z". Created under this name via the admin login of Nexcloud.
It made no problem with no clients exept for this one specific iOS Calendar thing.

[j-ed]

@GamerBene19 Thank you for the clarification. Just out of curiosity, have you tried to use %20 as a replacement for the space?

[GamerBene19]

@j-ed In the account url it is replaced automaticly (e.g. in the webserver log given) yes, but for the account name not.
Could be worth a try, if I find time for it.

[GamerBene19]

A thing to note here is that I updated form iOS 10.3.3 to 11.0.3.
But I don´t think, apple changed anything, since the error also occured wit iOS 11