Calendars invitations for event in shared calendars

[FabioLapolla]

Steps to reproduce

1. Create calendar and share it with other users or groups
2. A user with write permission on shared calendar creates event and invite other users (or email addresses)

Expected behaviour

The attendees should receive an email notification about the event and/or an invitation containing an .ics file.

Actual behaviour

No message is sent to the attendees after saving the new event.
Notification email is sent only when the event is deleted.

Server configuration

Operating system: Ubuntu 16.04.2 LTS 64bit

Web server: Apache 2.4.18

Database: MariaDB 10.0.29

PHP version: 7.0.15

Nextcloud version: 11.0.3 (stable)

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

Where did you install Nextcloud from: https://download.nextcloud.com/server/releases/nextcloud-11.0.3.zip

Signing status:

Signing status

No errors have been found.

List of activated apps:

App list

Enabled:
  - activity: 2.4.1
  - calendar: 1.5.2
  - comments: 1.1.0
  - contacts: 1.5.3
  - dav: 1.1.1
  - federatedfilesharing: 1.1.1
  - federation: 1.1.1
  - files: 1.6.1
  - files_pdfviewer: 1.0.1
  - files_sharing: 1.1.1
  - files_texteditor: 2.2
  - files_trashbin: 1.1.0
  - files_versions: 1.4.0
  - files_videoplayer: 1.0.0
  - firstrunwizard: 2.0
  - gallery: 16.0.0
  - logreader: 2.0.0
  - lookup_server_connector: 1.0.0
  - nextcloud_announcements: 1.0
  - notifications: 1.0.1
  - password_policy: 1.1.0
  - provisioning_api: 1.1.0
  - serverinfo: 1.1.1
  - sharebymail: 1.0.1
  - survey_client: 0.1.5
  - systemtags: 1.1.3
  - theming: 1.1.1
  - twofactor_backupcodes: 1.0.0
  - updatenotification: 1.1.1
  - workflowengine: 1.1.1
Disabled:
  - admin_audit
  - encryption
  - external
  - files_accesscontrol
  - files_automatedtagging
  - files_external
  - files_retention
  - templateeditor
  - user_external
  - user_ldap
  - user_saml

Nextcloud configuration:

Config report

    "system": {
        "instanceid": "***REMOVED SENSITIVE VALUE***",
        "passwordsalt": "***REMOVED SENSITIVE VALUE***",
        "secret": "***REMOVED SENSITIVE VALUE***",
        "trusted_domains": [
            "***REMOVED SENSITIVE VALUE***"
        ],
        "datadirectory": "***REMOVED SENSITIVE VALUE***",
        "overwrite.cli.url": "***REMOVED SENSITIVE VALUE***",
        "dbtype": "mysql",
        "version": "11.0.3.2",
        "dbname": "nextcloud",
        "dbhost": "localhost",
        "dbport": "",
        "dbtableprefix": "oc_",
        "dbuser": "***REMOVED SENSITIVE VALUE***",
        "dbpassword": "***REMOVED SENSITIVE VALUE***",
        "logtimezone": "UTC",
        "installed": true,
        "mail_smtpmode": "php", TRIED ALSO WITH smtp
        "mail_smtpsecure": "tls",
        "mail_from_address": "***REMOVED SENSITIVE VALUE***",
        "mail_domain": "***REMOVED SENSITIVE VALUE***",
        "mail_smtpauthtype": "LOGIN",
        "mail_smtpauth": 1,
        "mail_smtphost": "***REMOVED SENSITIVE VALUE***",
        "mail_smtpport": "587",
        "mail_smtpname": "***REMOVED SENSITIVE VALUE***",
        "mail_smtppassword": "***REMOVED SENSITIVE VALUE***",
        "updater.release.channel": "stable"

Are you using external storage, if yes which one: no

Are you using encryption: no

Are you using an external user-backend, if yes which one: no

Client configuration

Browser: Any (Firefox, Chrome, Chromium)
Ubuntu and Windows 7
Also with Thunderbird/Lightning

[tbdt]

I got the same problem.
Nextcloud version: 12.0.2 (stable)

[MorrisJobke]

cc @georgehrke

[MorrisJobke]

Noticed that it is a duplicate of #3830

[xeruf]

@MorrisJobke no it isn't, they explicitly asked to create a separate issue: #3830 (comment)

[xeruf]

Now tracked in #26668