Known Limitations for Outlook CardDAV Clients
Outlook CalDav Synchronizer is a CardDAV client (for more information, see https://sourceforge.net/projects/outlookcaldavsynchronizer/). The recommended synchronization profile option settings for Outlook CalDav Synchronizer are as follows:
Outlook settings. Select the following check box:
Synchronize items immediately after change
Sync settings. Set the following settings:
Synchronization Mode: Outlook <—— ——> Server (Two-Way)
Conflict Resolution: Automatic
To enable Outlook CalDav Synchronizer, define the following user properties for the CalDAV Service business service:
"Supported CardDAV UserAgent Prefix n" = "CalDavSynchronizer"
Select an appropriate number for n.
"CardDAV Put Use Actual ETag: CalDavSynchronizer" = "y"
This optional user property is required for CardDAV clients to make sure that client-side changes will not be overridden by the server data. CalDav Synchronizer must be the same as the supported prefix.