SUMMARY STEPS TO REPRODUCE 1. Link to a CardDav Account on mailo.com 2. Try to sync contact 3. OBSERVED RESULT Sync does not happen from server to Client. however, if a contact is created on the desktop, it gets reflected on the remote server (mailo.com) EXPECTED RESULT Contacts should be synced from remote server and client (two ways) SOFTWARE/OS VERSIONS Windows: macOS: Linux/KDE Plasma: Linux Manjaro (available in About System) KDE Plasma Version: 5.20.5 KDE Frameworks Version: 5.78.0 Qt Version: 5.15.2 ADDITIONAL INFORMATION Contacts and calendar are syncing fine in Evolution (Gnome) but it does not sync on Kmail.