diff --git a/src/main/java/io/kamax/mxisd/backend/ldap/LdapAuthProvider.java b/src/main/java/io/kamax/mxisd/backend/ldap/LdapAuthProvider.java
index a631e77..09dad06 100644
--- a/src/main/java/io/kamax/mxisd/backend/ldap/LdapAuthProvider.java
+++ b/src/main/java/io/kamax/mxisd/backend/ldap/LdapAuthProvider.java
@@ -30,6 +30,7 @@ import io.kamax.mxisd.auth.provider.AuthenticatorProvider;
 import io.kamax.mxisd.auth.provider.BackendAuthResult;
 import io.kamax.mxisd.config.MatrixConfig;
 import io.kamax.mxisd.config.ldap.LdapConfig;
+import io.kamax.mxisd.util.GsonUtil;
 import org.apache.commons.lang.StringUtils;
 import org.apache.directory.api.ldap.model.cursor.CursorException;
 import org.apache.directory.api.ldap.model.cursor.CursorLdapReferralException;
@@ -107,6 +108,10 @@ public class LdapAuthProvider extends LdapGenericBackend implements Authenticato
             String[] attArray = new String[attributes.size()];
             attributes.toArray(attArray);
 
+            log.debug("Base DN: {}", getBaseDn());
+            log.debug("Query: {}", userFilter);
+            log.debug("Attributes: {}", GsonUtil.build().toJson(attArray));
+
             try (EntryCursor cursor = conn.search(getBaseDn(), userFilter, SearchScope.SUBTREE, attArray)) {
                 while (cursor.next()) {
                     Entry entry = cursor.get();
diff --git a/src/main/java/io/kamax/mxisd/backend/ldap/LdapDirectoryProvider.java b/src/main/java/io/kamax/mxisd/backend/ldap/LdapDirectoryProvider.java
index a5fbad9..ec1a247 100644
--- a/src/main/java/io/kamax/mxisd/backend/ldap/LdapDirectoryProvider.java
+++ b/src/main/java/io/kamax/mxisd/backend/ldap/LdapDirectoryProvider.java
@@ -26,6 +26,7 @@ import io.kamax.mxisd.config.ldap.LdapConfig;
 import io.kamax.mxisd.controller.directory.v1.io.UserDirectorySearchResult;
 import io.kamax.mxisd.directory.IDirectoryProvider;
 import io.kamax.mxisd.exception.InternalServerError;
+import io.kamax.mxisd.util.GsonUtil;
 import org.apache.directory.api.ldap.model.cursor.CursorException;
 import org.apache.directory.api.ldap.model.cursor.CursorLdapReferralException;
 import org.apache.directory.api.ldap.model.cursor.EntryCursor;
@@ -70,9 +71,12 @@ public class LdapDirectoryProvider extends LdapGenericBackend implements IDirect
             attributes.add(getUidAtt());
             String[] attArray = new String[attributes.size()];
             attributes.toArray(attArray);
-
             String searchQuery = buildOrQueryWithFilter(getCfg().getDirectory().getFilter(), "*" + query + "*", attArray);
+
+            log.debug("Base DN: {}", getBaseDn());
             log.debug("Query: {}", searchQuery);
+            log.debug("Attributes: {}", GsonUtil.build().toJson(attArray));
+
             try (EntryCursor cursor = conn.search(getBaseDn(), searchQuery, SearchScope.SUBTREE, attArray)) {
                 while (cursor.next()) {
                     Entry entry = cursor.get();
diff --git a/src/main/java/io/kamax/mxisd/backend/ldap/LdapThreePidProvider.java b/src/main/java/io/kamax/mxisd/backend/ldap/LdapThreePidProvider.java
index cf289c9..7835e7f 100644
--- a/src/main/java/io/kamax/mxisd/backend/ldap/LdapThreePidProvider.java
+++ b/src/main/java/io/kamax/mxisd/backend/ldap/LdapThreePidProvider.java
@@ -27,6 +27,7 @@ import io.kamax.mxisd.lookup.SingleLookupReply;
 import io.kamax.mxisd.lookup.SingleLookupRequest;
 import io.kamax.mxisd.lookup.ThreePidMapping;
 import io.kamax.mxisd.lookup.provider.IThreePidProvider;
+import io.kamax.mxisd.util.GsonUtil;
 import org.apache.directory.api.ldap.model.cursor.CursorException;
 import org.apache.directory.api.ldap.model.cursor.CursorLdapReferralException;
 import org.apache.directory.api.ldap.model.cursor.EntryCursor;
@@ -78,6 +79,10 @@ public class LdapThreePidProvider extends LdapGenericBackend implements IThreePi
         String tPidQuery = tPidQueryOpt.get().replaceAll(getCfg().getIdentity().getToken(), value);
         String searchQuery = buildWithFilter(tPidQuery, getCfg().getIdentity().getFilter());
 
+        log.debug("Base DN: {}", getBaseDn());
+        log.debug("Query: {}", searchQuery);
+        log.debug("Attributes: {}", GsonUtil.build().toJson(getUidAtt()));
+
         try (EntryCursor cursor = conn.search(getBaseDn(), searchQuery, SearchScope.SUBTREE, getUidAtt())) {
             while (cursor.next()) {
                 Entry entry = cursor.get();