diff --git a/plugins/user-authenticators/ldap/src/main/java/org/apache/cloudstack/ldap/ADLdapUserManagerImpl.java b/plugins/user-authenticators/ldap/src/main/java/org/apache/cloudstack/ldap/ADLdapUserManagerImpl.java
index 552d5969a9e4..e96606dca2f9 100644
--- a/plugins/user-authenticators/ldap/src/main/java/org/apache/cloudstack/ldap/ADLdapUserManagerImpl.java
+++ b/plugins/user-authenticators/ldap/src/main/java/org/apache/cloudstack/ldap/ADLdapUserManagerImpl.java
@@ -93,10 +93,14 @@ protected boolean isUserDisabled(SearchResult result) throws NamingException {
     }
 
     protected String getMemberOfAttribute(final Long domainId) {
+        String rc;
         if(_ldapConfiguration.isNestedGroupsEnabled(domainId)) {
-            return MICROSOFT_AD_NESTED_MEMBERS_FILTER;
+            rc = MICROSOFT_AD_NESTED_MEMBERS_FILTER;
         } else {
-            return MICROSOFT_AD_MEMBERS_FILTER;
+            rc = MICROSOFT_AD_MEMBERS_FILTER;
         }
+        logger.trace("using memberOf filter = {} for domain with id {}", rc, domainId);
+
+        return rc;
     }
 }
diff --git a/plugins/user-authenticators/ldap/src/main/java/org/apache/cloudstack/ldap/LdapConfiguration.java b/plugins/user-authenticators/ldap/src/main/java/org/apache/cloudstack/ldap/LdapConfiguration.java
index 6a62ad8d99df..87ff2d0a2acd 100644
--- a/plugins/user-authenticators/ldap/src/main/java/org/apache/cloudstack/ldap/LdapConfiguration.java
+++ b/plugins/user-authenticators/ldap/src/main/java/org/apache/cloudstack/ldap/LdapConfiguration.java
@@ -27,9 +27,12 @@
 
 import com.cloud.utils.Pair;
 import org.apache.cloudstack.ldap.dao.LdapConfigurationDao;
+import org.apache.logging.log4j.LogManager;
+import org.apache.logging.log4j.Logger;
 
 public class LdapConfiguration implements Configurable{
     private final static String factory = "com.sun.jndi.ldap.LdapCtxFactory";
+    protected Logger logger = LogManager.getLogger(getClass());
 
     private static final ConfigKey<Long> ldapReadTimeout = new ConfigKey<Long>(
             Long.class,
@@ -325,7 +328,7 @@ public LdapUserManager.Provider getLdapProvider(final Long domainId) {
         try {
             provider = LdapUserManager.Provider.valueOf(ldapProvider.valueIn(domainId).toUpperCase());
         } catch (IllegalArgumentException ex) {
-            //openldap is the default
+            logger.warn("no LDAP provider found for domain {}, using openldap as default", domainId);
             provider = LdapUserManager.Provider.OPENLDAP;
         }
         return provider;
diff --git a/plugins/user-authenticators/ldap/src/main/java/org/apache/cloudstack/ldap/OpenLdapUserManagerImpl.java b/plugins/user-authenticators/ldap/src/main/java/org/apache/cloudstack/ldap/OpenLdapUserManagerImpl.java
index 4c125af2ea67..d0b6bc4bd34d 100644
--- a/plugins/user-authenticators/ldap/src/main/java/org/apache/cloudstack/ldap/OpenLdapUserManagerImpl.java
+++ b/plugins/user-authenticators/ldap/src/main/java/org/apache/cloudstack/ldap/OpenLdapUserManagerImpl.java
@@ -63,7 +63,7 @@ protected LdapUser createUser(final SearchResult result, Long domainId) throws N
         final String firstname = LdapUtils.getAttributeValue(attributes, _ldapConfiguration.getFirstnameAttribute(domainId));
         final String lastname = LdapUtils.getAttributeValue(attributes, _ldapConfiguration.getLastnameAttribute(domainId));
         final String principal = result.getNameInNamespace();
-        final List<String> memberships = LdapUtils.getAttributeValues(attributes, _ldapConfiguration.getUserMemberOfAttribute(domainId));
+        final List<String> memberships = LdapUtils.getAttributeValues(attributes, getMemberOfAttribute(domainId));
 
         String domain = principal.replace("cn=" + LdapUtils.getAttributeValue(attributes, _ldapConfiguration.getCommonNameAttribute()) + ",", "");
         domain = domain.replace("," + _ldapConfiguration.getBaseDn(domainId), "");
@@ -87,7 +87,7 @@ private String generateSearchFilter(final String username, Long domainId) {
         usernameFilter.append((username == null ? "*" : LdapUtils.escapeLDAPSearchFilter(username)));
         usernameFilter.append(")");
 
-        String memberOfAttribute = _ldapConfiguration.getUserMemberOfAttribute(domainId);
+        String memberOfAttribute = getMemberOfAttribute(domainId);
         StringBuilder ldapGroupsFilter = new StringBuilder();
         // this should get the trustmaps for this domain
         List<String> ldapGroups = getMappedLdapGroups(domainId);