Hi,
Files are sent to the server but with .tmp extension.
Thanks for help.
Sam
Log extract :
[5FPON] 16:06:32 INFO: Puller (folder "biaum@orange.fr" (5ufpf-4fiek), file “AppData\Local\Microsoft\Outlook\Outlook.pst”): finisher: pull: peers who had this file went away, or the file has changed while syncing. will retry later
Syncing your PST file may not be a good idea - Syncthing will have to hash the entire PST when every change is detected, and remote devices will have to re-hash the entire file every time it’s synced. That’ll chew up a lot of CPU and I/O and if the sync doesn’t complete each time, you won’t have changes synced to remote devices. All the while Outlook is open on one device it will not be able to sync until closed.
I backup my emails from smtp by running an additional client, getting it up to date, then terminating it and only then do I backup to ensure a consistent state of all the data files. I don’t consider emails being on the server as a backup, for a similar reason that I don’t consider an additional Syncthing device a backup: If somehow files get deleted on any client, they also get deleted on the server. If you need to backup the pst itself, I believe there’s no other option than ensuring that outlook is terminated while the backup happens.