BM-22547: Fixes: When editing from a CalDAV client (Thunderbird, Apple Calendar), replies from participants who have already replied are not propagated.
A clone no longer executes calendar hooks, which previously caused it to crash when automatically accepting a resource booking. This also prevents duplicates (Webex emails, reminders) and the deletion of video conference rooms that have already been deleted by the main server.
The core no longer freezes when a container is searched for simultaneously by UID and ID. Previously, this freeze would overload the REST request pool and require the core to be restarted.
BM-24430: Fixes: upgrade to Keycloak (26.2.5-bluemind45959). The global.virt realm now searches for users across all domains again, rather than just within global.virt.
Fix: the purge of orphaned message bodies, which runs every 2 hours, no longer scans the entire t_message_body table.
Improvement: hybrid Outlook MAPI synchronisation (Outlook in hidden mode with a synchronisation window) no longer reads the body of every email in the folder, which speeds up the synchronisation of large folders.