The search index could not be updated. The site is misconfigured. Contact an administrator. SQLSTATE[42000]: Syntax error or access violation: 1064 unknown table 'tiki_main_67e2559f7089d' in delete request
For AD, the LDAP user attribute is supposed to be samAccountName. But I don't know if that's the cause. Try that.
You might also check the security for directory service event log for clues.
