Running Jenkins 1.565.1, LDAP plugin 1.10.2.

I found multiple topics on this subject, but none of them seem to solve my problem.

I am trying to set up LDAP authentication on my Jenkins in my corporate network. Jenkins is running on Linux.
Here are my LDAP settings:

Server: ldap://my_server.abc.corp.company.com
root DN: dc=abc,dc=corp,dc=company,dc=com
manager DN: my_name@abc.corp.company.com
manager password: set

Other settings are blank/default.
When I try to login to Jenkins, even using the same "manager" login, I get a failure, and see the following error in the Jenkins log:

org.acegisecurity.providers.ldap.authenticator.BindAuthenticator2 handleBindException
WARNING: Failed to bind to LDAP: userDnCN=my_name,OU=UserPersonalities,OU=site,OU=UNIX,OU=A Name With Spaces,OU=Resources,dc=abc,dc=corp,dc=company,dc=com username=my_name
javax.naming.AuthenticationException: [LDAP: error code 49 - 80090308: LdapErr: DSID-0C0903A8, comment: AcceptSecurityContext error, data 52e, v1db1]

I found a Groovy script that was supposed to help me debug the issue:
String[] names = ["my_name","another_name"];
for (name in names) {
println("Checking the name '" + name + "'...")
try

{ println(" It is a USER: " + Jenkins.instance.securityRealm.loadUserByUsername(name)) }

catch (Exception e)

{ println(" It is NOT a user, reason: " + e.getMessage()) }

println("");
}

However, it can find the username successfully:
Checking the name 'my_name'...
It is a USER: org.acegisecurity.userdetails.ldap.LdapUserDetailsImpl@5a26cfb7

Checking the name 'another_name'...
It is a USER: org.acegisecurity.userdetails.ldap.LdapUserDetailsImpl@143fee62

Moreover, I can successfully authenticate using the Active Directory plugin, but its performance is very low (it takes 1-2 minutes to authorize a user), and I don't see any setting to tweak that.