Created attachment 11468 [details]
Level 10 Debug Log
A fresh installed Windows 10 and Office 2013 oder 2016!
Starting up Outlook as a Domain User and creating an IMAP based account fails.
Doing the same with a logcal Account does not fail. According to this post, this does not happen with windows 2012R2
Attached a Level 10 Debug log from the client on the samba server
Samba Veriosn is:Version 4.2.4-SerNet-Debian-7.jessie
The logfile covers the time frame within outlook, when entering email server data and press "next" until the failure occurs
Created attachment 11472 [details]
Screenshots from Outlook - To reproduce the error
If the domain was created before Samba 4.2, then you may need to do this:
Assuming that fixes it, I'll mark this as a duplicate
*** This bug has been marked as a duplicate of bug 11097 ***
As a feedback: That resolved the issue - outlook 2016 works now