• Collabora: fix inserting images from filemanager
• Notifications: aggregate messages by app:id to return only latest one, also added a cut-off date of 30 days and cleaning older messages
• Addressbook/REST API: categories were lost, when updating existing contacts
• Mail/REST API: always add signature below supplied body (independent of user preference for reply/forward)
• Calendar/REST API: adding of participants to events
• ActiveDirectory: supporting well-known SIDs not matching the domain-SID e.g. S-1-5-32-544 for BUILDIN\Administrators
• AD Import: run full group import for AD, as it does not update modification time of group, when memberships change
• AD/LDAP Import: allow setting import frequency < 1h eg. .1: every 5min, .5: every 30min
• Api: converted action-system to TypeScript
• Many translations
• New icons (email) WIP
• Extended release notes