@bhuffman said in Old appointments getting lost and not resyncing:
@Manfred - I can not find this setting anywhere on my device. I believe that Google made their own exchange services when Android 6 was released. Perhaps there’s no option to change this setting in the new version?
as every vendor has its own ActiveSync implementation, that might be very well possible.
Could you try to edit the appointment in webapp (e.g. add a category) and see if it appears on the mobile? It would be great if you’d set the loglevel to WBXML at least for your user while you test this.
Do those missing appointments have anything in common? E.g. all of them are meetings and the organiser is someone else.