OK. I switched on the documents feature in COS. I added notebook account with the command:
zmprov in ....
I got errors about not being able to parse documents. I decided to restart zimbra and now. after connection to web interface tomcat dies. with many errors (10 pages or more) about wikis not found.

So how can i switch the wiki/Documents off ? zmprov does not work (only with -l it works)