diff --git a/CHANGELOG.md b/CHANGELOG.md
index f6c622c8..dfedab6c 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -11,6 +11,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ### Changes
 
+- updated ldap search from name and familyname to one single attribute "displayname"
+
 ### Deprecated
 
 ### Removed
diff --git a/mex/common/ldap/extract.py b/mex/common/ldap/extract.py
index 7fa371e2..74836268 100644
--- a/mex/common/ldap/extract.py
+++ b/mex/common/ldap/extract.py
@@ -116,38 +116,34 @@ def get_merged_ids_by_query_string(
 
 
 def get_persons_by_name(
-    surname: str = "*",
-    given_name: str = "*",
+    display_name: str = "*",
     **filters: str,
 ) -> Generator[LDAPPerson, None, None]:
     """Get all ldap persons matching the filters.
 
     Args:
-        given_name: Given name of a person, defaults to non-null.
-        surname: Surname of a person, defaults to non-null.
+        display_name: Full name of the searched person, defaults to non-null.
         **filters: Additional filters.
 
     Returns:
         Generator for LDAP persons.
     """
     connector = LDAPConnector.get()
-    return connector.get_persons(surname, given_name, **filters)
+    return connector.get_persons(displayName=display_name, **filters)
 
 
 def get_count_of_found_persons_by_name(
-    surname: str = "*",
-    given_name: str = "*",
+    display_name: str = "*",
     **filters: str,
 ) -> int:
     """Get total count of found ldap persons.
 
     Args:
-        given_name: Given name of a person, defaults to non-null.
-        surname: Surname of a person, defaults to non-null.
+        display_name: Full name of the searched person, defaults to non-null.
         **filters: Additional filters.
 
     Returns:
           count of found persons.
     """
     connector = LDAPConnector.get()
-    return len(list(connector.get_persons(surname, given_name, **filters)))
+    return len(list(connector.get_persons(displayName=display_name, **filters)))
diff --git a/tests/ldap/test_extract.py b/tests/ldap/test_extract.py
index a3aa30a8..e47568bb 100644
--- a/tests/ldap/test_extract.py
+++ b/tests/ldap/test_extract.py
@@ -180,7 +180,7 @@ def test_get_merged_ids_by_query_string(
 
 def test_get_persons_by_name_mocked(ldap_mocker: LDAPMocker) -> None:
     ldap_mocker([[SAMPLE_PERSON_ATTRS]])
-    persons = get_persons_by_name(surname="Sample", given_name="Sam")
+    persons = get_persons_by_name(display_name="Sam Sample")
     persons_list = list(persons)
     expected = {
         "company": "RKI",
@@ -204,7 +204,5 @@ def test_get_persons_by_name_mocked(ldap_mocker: LDAPMocker) -> None:
 
 def test_get_count_of_found_persons_by_name_mocked(ldap_mocker: LDAPMocker) -> None:
     ldap_mocker([[SAMPLE_PERSON_ATTRS]])
-    persons_count = get_count_of_found_persons_by_name(
-        surname="Sample", given_name="Sam"
-    )
+    persons_count = get_count_of_found_persons_by_name(display_name="Sam Sample")
     assert persons_count == 1