Calendars sharing with ldap group (ldap Synology nas)

[philippec78]

When sharing a calendar with a group, sharing works but it is impossible to disable notifications from users of "Calendars" on MacOS.
(The deactivation is possible but the notifications come back after a few hours!)

If I share a calendar with a user, no problem, it works as expected.

Steps to reproduce

1. Sharing a calendar with a group
2. Ignore alerts on the OSX "Calendars" app
3. After a few hours, the alerts come back

Expected behaviour

Alerts must remain disabled

Actual behaviour

After a few hours, the alerts come back (Or a few days later)

Operating system:
Ubuntu Linux 16.04

Web server:
Apache version 2.4.18

Database:
MySQL version 5.7.27

PHP version:
php7.0

ownCloud version:
Owncloud 10.1.1 (stable)

Calendar version:
Calendar 1.6.3 (same problem with 1.6.2)

LDAP configuration

+-------------------------------+--------------------------------------------------+
| Configuration | |
+-------------------------------+--------------------------------------------------+
| hasMemberOfFilterSupport | 1 |
| hasPagedResultSupport | |
| homeFolderNamingRule | |
| lastJpegPhotoLookup | 0 |
| ldapAgentName | uid=root,cn=users,dc=ldap,dc=customer,dc=lan |
| ldapAgentPassword | *** |
| ldapAttributesForGroupSearch | |
| ldapAttributesForUserSearch | uid;gecos;mail |
| ldapBackupHost | |
| ldapBackupPort | |
| ldapBase | dc=ldap,dc=customer,dc=lan |
| ldapBaseGroups | cn=groups,dc=ldap,dc=customer,dc=lan |
| ldapBaseUsers | cn=users,dc=ldap,dc=customer,dc=lan |
| ldapCacheTTL | 600 |
| ldapConfigurationActive | 1 |
| ldapDynamicGroupMemberURL | |
| ldapEmailAttribute | mail |
| ldapExperiencedAdmin | 0 |
| ldapExpertUUIDGroupAttr | |
| ldapExpertUUIDUserAttr | |
| ldapExpertUsernameAttr | uid |
| ldapGroupDisplayName | cn |
| ldapGroupFilter | (&(|(objectclass=posixGroup))(|(cn=agenda-all))) |
| ldapGroupFilterGroups | agenda-all |
| ldapGroupFilterMode | 1 |
| ldapGroupFilterObjectclass | posixGroup |
| ldapGroupMemberAssocAttr | member |
| ldapHost | ldaps://192.168.1.7 |
| ldapIgnoreNamingRules | |
| ldapLoginFilter | (&(|(objectclass=posixAccount))(uid=%uid)) |
| ldapLoginFilterAttributes | |
| ldapLoginFilterEmail | 0 |
| ldapLoginFilterMode | 0 |
| ldapLoginFilterUsername | 1 |
| ldapNestedGroups | 0 |
| ldapOverrideMainServer | |
| ldapPagingSize | 500 |
| ldapPort | 636 |
| ldapQuotaAttribute | |
| ldapQuotaDefault | 1073741824 |
| ldapTLS | 0 |
| ldapUserDisplayName | gecos |
| ldapUserDisplayName2 | |
| ldapUserFilter | (|(objectclass=posixAccount)) |
| ldapUserFilterGroups | agenda-all |
| ldapUserFilterMode | 1 |
| ldapUserFilterObjectclass | posixAccount |
| ldapUserName | samaccountname |
| ldapUuidGroupAttribute | auto |
| ldapUuidUserAttribute | auto |
| turnOffCertCheck | 1 |
| useMemberOfToDetectMembership | 1 |
+-------------------------------+--------------------------------------------------+

Hosting on Synology RS815 with dsm 6.2.1-23824 U1 and ldap server version 2.4.40-2496

Operating system:
MacOS 10.12 - 10.13 - 10.14.5

CalDAV-clients:
OSX Calendars 11.0

I can not understand what's going on. Has anyone ever had this problem?

[philippec78]

No solution for this problem ?
(same problem with 1.6.4)