Hi @didier-walraet ,
there were still a couple of deviceid entries in your post, I've anonymised them as well.
The device sends its id in the request, so it's strange that it's not included in the response.
Are there any OPTIONS requests in /var/log/grommunio-sync/grommunio-sync.log?
andreaslang One possibility would be to remove the account on device, remove the device from the list in the admin UI and then create the account on the mobile again.
Did you try exactly these steps?
