I want to come back on this and seek out for more help. I still cannot make this work reliably. I flashed my device a couple of times and MfE easily picks up mail but no calendar whatsoever. I think it might be due to an entry the N9 cannot cope with but I need some help to debug this.

I debugged it from the Outlook 365 end but the log file returned to me did not reveal anything suspicious.

How can I debug this from my N9. I guess I need to set up developer mode and then enable remote access. I can figure that out, done that before. But where do I find any logfile regarding the Outlook 365 calendar syncs.

Thanks
Rob