I get above message when I press “Test LDAP Resolver” in the web page.
I use PrivacyIDEA 3.5.1 on CentOS 7 with python 2.7.5
I downloaded the ldap-test.py script, and that script was complaining about ldap3, so I added the ldap3 path to the searchlist by creating /usr/lib/python2.7/site-packages/ldap3.pth with line /usr/lib/python2.7/site-packages/ldap3.pth in it.
If I run the script now, it shows x users, if I use the web page I still get 0 user objects found.
test-ldap.py is a script from RickP mentioned in topic AD Domain Trusts/LDAP Queries - #3 by RickP