I took over a servicedesk installation, which is very old. 

Now I want to upgrade it to the latest version as per the Upgrade Sequence.

Now I'm at 9.1.2.1

Active directory Auth works (tested by changing password and immediately logon to servicedeskplus with the new password, worked).

But I cannot see AD auth selected nor LDAP auth is activated. Strangely, AD import is enabled... 

And when I upgraded from 9000 -> 9100 -> 9121 -> 9200 -> 9300, things get worse and I cannot even login. The logs for 9300 can be found below (9300 is no more reachable since I reverted back to the 9121 snapshot).

I can login at version 9200.

What can be the problem. What should I do to correctly upgrade to latest versions.

My best

Kagan